Answer:
C. 39
Step-by-step explanation:
Note:
A prime number is a number that is only divisible by 1 and itself.
13 is only divisible by 1 and itself.
37 is only divisible by 1 and itself.
47 is only divisible by 1 and itself.
But 39 is divisible by 1, 3, 13 and 39.
I hope it helps you. Please choose my answer as the BRAINLIEST.