A. Mutation is part of evolution by natural selection, without mutation there would be no evolution full stop. It is mutants that are naturally selected against or for.
All of these properties require one another, none of them would make sense in isolation, which is why the biological sciences didn't grind to a satisfied stop in the 1870's - it was obvious that remaining mysteries lurked all about.
Physical migration of an organism from one region to another.
C. Genetic drift, far enough. We understand that well enough.
I have no idea what you mean by "well enough". Do you have some utterly misguided notion that the major questions of genetics are "solved"? We are in the middle of a huge revolution in how genetic expression is understood, with major discoveries happening by the week. These are very exciting times, and we are lucky to have witnessed the frontier years of epigenetic studies. I don't think we have a clue yet about the full scale of what we have to discover.
D. Sexual selection is part of natural selection, it is a natural selection pressure like any other.
You could sort of see it as a form of natural selection and some do categorize it as such, but it is not "like any other", it follows entirely different trajectories, and they are unique to the organism.
I don't see the appeal, if you love biology, of reducing it to inadequately simple ideas. It is much more interesting in its full scale and variability. And if you are attempting to come down on the side of empiricism, as per the topic of this thread, I definitely don't see the appeal. Part of the reason for the emphasis scientists place on empirical observation is that the real world is almost inevitably more chaotic and complex than human modelling adequately predicts for; the natural world perpetually corrects our ideas about it, not the other way around. The scientist will always be the pupil, not the master, of the senses.