for every positive integer n, the function h(n)is defined to be the product of all the even integers form 2 to n,inclusive,if p is the smallest prime factor of h(100)+1,then p is A,between 2 and 10 B,between 10 and 20 C,between 20 and 30 D,between 30 and 40 E,greater than 40 答案是E,整个不知道该怎么下手啊,求大N解救!小女子感激不尽!!