Yes, option 3 is probably correct.
Yes. And that is the challenge. Reconciling these two will be a challenge. A worthy pursuit. Rewarding.
However, I am not sure what do you mean with the contradiction, please explain first why do you think there is a contradiction between Luke 9 and Matthew 5?
Sure. In Matthew 5 Jesus makes a vow. A vow begins with: ἀμὴν.
Matthew 5:18
ἀμὴν γὰρ λέγω ὑμῖν, ἕως ἂν παρέλθῃ ὁ οὐρανὸς καὶ ἡ γῆ, ἰῶτα ἓν ἢ μία κεραία οὐ μὴ παρέλθῃ ἀπὸ τοῦ νόμου ἕως ἂν πάντα γένηται.
NWT:
Truly I say to you that sooner would heaven and earth pass away than for one smallest letter or one stroke of a letter to pass away from the Law until all things take place
please explain first why do you think there is a contradiction between Luke 9 and Matthew 5?
In Luke 9, Jesus is erasing letters of the Law. In Matthew 5 Jesus vows, ἀμὴν, that heaven and earth would pass away before that would happen. The law clearly states:
D'varim ( Deuteronomy ) 21:23
לֹֽא־תָלִ֨ין נִבְלָת֜וֹ עַל־הָעֵ֗ץ כִּֽי־קָב֤וֹר תִּקְבְּרֶ֨נּוּ֙ בַּיּ֣וֹם הַה֔וּא כִּֽי־קִלְלַ֥ת אֱלֹהִ֖ים תָּל֑וּי וְלֹ֤א תְטַמֵּא֙ אֶת־אַדְמָ֣תְךָ֔ אֲשֶׁר֙ יְהֹוָ֣ה אֱלֹהֶ֔יךָ נֹתֵ֥ן לְךָ֖ נַֽחֲלָֽה
NWT:
his dead body should not remain all night on the stake. Instead, you should be sure to bury him on that day, because the one hung up is something accursed of God, and you should not defile your land that Jehovah your God is giving you as an inheritance.
The letters Jesus is erasing, in spite of his vow, are:
- קָב֤וֹר תִּקְבְּרֶ֨נּוּ֙ - literally "we shall surely bury" WE. Conjugated "nun-vav" suffix. "נּוּ֙" That's why WE bury the dead in my community. Hopefully you recall, I told you this already. In my community, WE pick up the shovels and WE completely cover the casket in dirt on all four sides and the top. And WE don't stop until it is complete, because WE are righteous God fearing Jews who respect the Law of The Most High.
- אֶת־אַדְמָ֣תְךָ֔ אֲשֶׁר֙ יְהֹוָ֣ה אֱלֹהֶ֔יךָ נֹתֵ֥ן לְךָ֖ נַֽחֲלָֽה - literally "the entire land, all it includes, everything flowing within it, from the bottom to the top, A to Z, which YHVH, your divine power, is giving to you, an inheritance."
there is a contradiction between Luke 9 and Matthew 5?
Yes. There is a contradiction. It can be reconciled. But I doubt you will be willing to pay the price.
In Luke 9 a Jewish soul approaches Jesus. Jesus, at that time, is adopting the role of the "Son-Of-Man". Jesus tells the man NOT to follow the law because he is not one of the dead.
When Jesus tells the Jewish soul who approaches him while Jesus is adopting the role of the "Son-of-Man" that he, the Jewish soul, should not bury the dead because he, the Jewish soul is not dead, Jesus is splitting the Jewish nation in half. The law says WE are united. Not only are the Jewish souls untied one to the other ( Psalm 133 ), but we are being given the land, completely, in total ( Deut 21:23 among many others ).
Jesus is splitting the Jewish people from each other and from their land because he is role playing as an angel who does that work beyond the material realm: The-Son-Of-Man. That's how to reconcile the verses. Jesus is thinking, at that time, the heavens and the earth have passed away already ( Isaiah 51:6 ). But he was wrong.
If the heavens and the earth have already passed away, then, Matthew 5 is not in contradiction with Luke 9. The Law, according to Jesus, at that time, can be changed in that case. However, he was wrong about that too. I'm quite certain he understands better now.