Which one of the following is NOT a method for developing invisible fingerprints during a crime scene search for evidence?

A. Powders
B. Rolling
C. Chemicals
D. Fuming

is it B

2. Information obtained during an interview and recorded in an investigator's field notes is admissible in court if it meets certain tests. All of the following are tests for admissibility EXCEPT:
A. competency.
B. materiality.
C. objectivity.
D. relevancy.

im confused between B and C