After Reading the Paragraph Below, Answer the Questions That Follow

Multiple Choice

After reading the paragraph below, answer the questions that follow.
In examining the effects of atrazine, one of the most commonly used herbicides in the world, scientists studied the mating behavior of male frogs exposed to atrazine (Atr) compared to a group that was not exposed (Non) . The results are shown in the figure.

-The experiment in part A was important to the overall conclusions by demonstrating all of the following except

A) all trials of the experiment had frogs of about the same size.
B) there is variation in body weight.
C) body size did not have an impact on successful mating.
D) frogs gain weight over time.