A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed, the resulting genotype were in the ratio of________.

A. 1:2:1:: Tall heterozygous: Tall homozygous: Dwarf

B. 3:1:: Tall: Dwarf

C. 3:1:: Dwarf: Tall

D. 1:2:1: Tall homozygous: Tall heterozygous: Dwarf