They weren’t artists they were detectives in disguise. [Choose the Correct Answer]

A. They weren’t artists, as they were detectives in disguise
B. They weren’t artists, they were detectives in disguise
C. They weren’t artists, they were detectives in disguise
D. They weren’t artist, they were detectives in disguise

Correct Answer: C. They weren’t artists, they were detectives in disguise