Review the detail;
In "The Think Tank," Shumaker admits that he did not think that Azy would be the fastest learner.
Which BEST explains why the author included that text in the passage?
A. To show Azy only started learning better when Shumaker started working with her.
B. To show Shumaker used to dislike working with Azy.
C. To show that researchers must do some things they consider difficult.
D. To show animals can surprise even experts with their capacity to learn.
