Pea plants were particularly well suited for use in Mendel's breeding experiments for all of the following reasons except that
A) peas show easily observed variations in a number of characters, such as pea shape and flower color.
B) it is possible to control matings between different pea plants.
C) it is possible to obtain large numbers of progeny from any given cross.
D) peas have an unusually long generation time.
E) many of the observable characters that vary in pea plants are controlled by single genes.
D) peas have a short generationtime.