People discovered long ago that cross pollination of certain plant varieties could improve farm crops' flavor. Answering which question BEST helps people to produce crops with desired flavors?
A.
Which genes in plants code for a sweet flavor?
B.
Which plants need to be selected for breeding to produce the best-tasting offspring plants?
C.
How does cross pollination produce unique offspring with different flavors?
D.
How does artificial selection of crops affect surrounding crops?