Atticus knew that Tom Robinson would be found guilty because: A) All of the choices are correct.
B) Atticus did not present very convincing evidence.
C) He was African American.
D) Mayella was a very believable witness.
E) Bob Ewell had a friend on the jury.

C

Explanation:

C) He was African American

Explanation:

Mayella and Bob were considered "white trash," and were seen as outcasts. Therefore options D, E, and A can be eliminated. As for option B, Atticus was considered to be a great lawyer and often talked about his work. So that only leaves option C.