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 C adds to the conclusions by

A) giving evidence that all frogs in the experiments were male.
B) suggesting a possible explanation for the effect of atrazine.
C) showing that testosterone levels are lower in untreated frogs.
D) demonstrating a lack of relationship between successful mating and testosterone.