If the integer n has exactly five positive divisors, including 1 and n, how many positive divisors does n^2 have?  Select:
A) 5 B) 7 C) 9 D) 10 E) 11
take the example of 16...   it has 5 positive divisors (1,2,4,8,16)   Now, take the example of 256...   it has only 9 divisors..   so 9 is the ans
<result>C</result>
If the integer n has exactly five positive divisors, including 1 and n, how many positive divisors does n^2 have?