I believe it is either B or A, personally i'm leaning towards B, but at the same time, i don't think that we would be obtaining materials via pollination, so it then causes A to make more sense.
The coast is warmer and better environment
D) DNA is found in chromosomes in the nucleus, while RNA can move around the cell.
The answer is B, it bonds the DNA strand because it binds to the DNA strand during transcription to then separates the DNA strand afterward.