A number of students in our class _______ League Members, and the number ________ 39.[ ]

A. is, is

B. are, are

C. are, is

D. is, are

以下程序的输出结果是______。
fun(int x，inty，int z)
z=x*x+y*y；
main()
int a=31；
fun(6，3，a)
printf("%d"，a)