The least common multiple of a positive integer n and 18 is 180 , and the greatest common divisor of n and 45 is 15 . What is the sum of the digits of n ?

**Answer Choices**

A. 3

B. 6

C. 8

D. 9

E. 12

The least common multiple of a positive integer n and 18 is 180 , and the greatest common divisor of n and 45 is 15 . What is the sum of the digits of n ?

**Answer Choices**

A. 3

B. 6

C. 8

D. 9

E. 12