If n = 20! + 19, then n is divisible by which of the following?
I. 15
II. 17
III. 19	Choose the correct choice from the following
A) I only	B) II only	C) III only	D) I and II	E) II and III
19 divides 20! so 19 also divides 20! + 19.   15 and 17 divide 20! so they do not divide 20! + 19.   The answer is III only.
<result>C</result>
If n = 20! + 19, then n is divisible by which of the following?
I. 15
II. 17
III. 19