A true-breeding tall plant was crossed to a dwarf plant. Tallness is a dominant trait. The F1 individuals were allowed to self-fertilize. What are the following probabilities for the F2 generation?
A. The first plant is dwarf.
B. The first plant is dwarf or tall.
C. The first three plants are tall.
D. For any seven plants, three are tall and four are dwarf.
E. The first plant is tall, and then among the next four, two are tall and the other two are dwarf.