The correct option is
C The factors of 14 are: 1, 2, 7, 14
The factors of 16 are: 1, 2, 4, 8, and 16
The factors of 7 are: 1 and 7
The factors of 12 are: 1, 2, 3, 4, 6, and 12
Prime numbers are numbers with only two factors; thus, from the list, only 7 is a prime number.