If n is a positive integer and n^2 is divisible by 50, then what is the largest positive integer that must divide n?	Choose the correct choice from the following answers.
A) 5
B) 8
C) 10
D) 20
E) 25

Rationale: "50 = 2 * 5 ^ 2 if 50 divides n ^ 2 , then n must be divisible by 2 * 5 = 10 the answer is c ."
Answer: C