有以下程序：#definef(x)(x*x)main(){inti1,i2;i1=f(8)/f(4); i2=f(4+4)/f(2+2);printf("%d,%d\n",i1,i2);}程序运行后的输出结果是______。

A．64,28

B．4,4

C．4,3

D．64,64

What's the basis of your belief ( ) the product is safe

A．why

B．that

C．how

D．/