For every positive even integer n, the function h(n) is defined to be the product of all even integers from 2 to n, inclusive. For instance, h(10)= 2x4x6x8x10. What is the greatest prime factor of h(28)+h(30)? Choose the most appropriate option:
A) 5	B) 7	C) 13	D) 29	E) 31
h(28)+h(30)   Since h(n) is the product of all even integers from 2 to n, we can say that all the factors of h(28) will be there in h(30)   so we can write the expression as h(28) (1+30)= h(28) *31   31 is the greatest prime factor since all the prime factors in h(28) will be smaller than 31.   31 is the answer
<result>E</result>
For every positive even integer n, the function h(n) is defined to be the product of all even integers from 2 to n, inclusive. For instance, h(10)= 2x4x6x8x10. What is the greatest prime factor of h(28)+h(30)?