can someone help me with this question please.

Assuming that each of the following pieces of evidence is admissible, including a reliably documented chain of custody, which would NOT be useful in determining the facts of the case?
A. A photograph of the crime scene
B. Matching DNA test from blood at the scene and a hair sample from a suspect
C. An eye witness who says she thought she recognized that someone at the scene looks like the accused
D. A neighbor who says that the accused was known to have drugs when she was in high school