A botanist crosses a pea plant that produces smooth seeds with a pea plant that produces wrinkled seeds. The resulting plants all produce smooth seeds. What can be determined from the results of the experiment?
A. Smooth shape and wrinkled shape are both recessive traits.
B. Smooth shape and wrinkled shape are both dominant traits.
C. Smooth shape is a dominant trait, and wrinkled shape is a recessive trait.
D. Smooth shape is a recessive trait, and wrinkled shape is a dominant trait.