If m, n, and o are three different positive integers whose sum is prime, which of the following statements could be true?	Select the correct option:
A) Each of m + n, m + o, and n + o is prime.
B) Each of m + 3, n + 3, and o + 3 is prime.
C) Each of m, n, and o is prime.
D) The average (arithmetic mean) of m, n, and o is prime.
E) m + n = o
the question asks could be!!!!   this means that if at least one option works, it is the answer.   3, 7, 19 satisfies the condition, since 29 is a prime number. Since the question asks for a could be - we know automatically that Each of m, n, and o is prime. is the answer.
<result>C</result>
If m, n, and o are three different positive integers whose sum is prime, which of the following statements could be true?