Which is one purpose that the photographs that accompany the article serve in "the think tank"?

a.
they show other scientists at the think tank, which gives readers an idea of how big this project is.

b.
they show shumaker outside of the research laboratory, which shows readers that he has many different interests.

c.
they show azy at work, which lets readers see how the tests work.

d.
they show azy with other animals, which readers see how happy he is.