Interpreting This Figure, Which of the Following Is a Similarity

Multiple Choice

Interpreting this figure, Which of the following is a similarity between Lamark's proposal for evolution and that of Darwin?

A) Both scenarios begin with a population of giraffes that contains variation.
B) Both scenarios expose the giraffes to an environmental pressure (or challenge) .
C) Both scenarios involve only an individual, not a population.
D) Both scenarios involve differential reproductive success.
E) Both scenarios involve giraffes of equal fitness.