已知int a = 1;下列四句话，能够成功编译的是：

A、int* p1 = a;
B、int* p2 = &a;
C、int* p3 = *p1;
D、int* p4 = &*p2;
喵查答案：int* p2 = &a;
int* p4 = &*p2;