Which of These Is NOT a Reason That Mendel Used

Multiple Choice

Which of these is NOT a reason that Mendel used pea plants as a model to study inheritance?

A) There are many varieties with distinct and different characteristics.
B) They cannot self-fertilize.
C) It is easy to control cross-fertilizations.
D) The varieties he chose would show the same variant for a trait in generation after generation.
E) They have large flowers.