请教蓝皮书数学44题

44. If M and N are positive integers that have remainders of 1 and 3, when divided by 6, which of the following could not be a possible value of M+N?

A.86

B.52

c.34

D.28

E.10

请好心人帮我讲讲这道题的思路，谢谢！