Answer:
B
Step-by-step explanation:
It only has prime numbers.
Prime numbers are numbers that don't have two whole numbers (besides 1 and itself) that have factors to them.
Ex.) 15 isn't a prime number.
5(3).
Ex.) 7 is a prime number
Nothing besides 7 and 1 works
7(1)
Fun fact: 2 is the only even prime number
=) Good Luck
