有如下类和对象的定义:
class Constants
public:
static double getPI() return 3.1416;
;
Constants constants;
下列各组语句中,能输出3.1416的是______。
A.cout<<constants->getPI();和cout<<Constants::getPI();
B.cout<<constants.getPI();和cout<<Constants.getPI();
C.cout<<constants->getPI();和cout<<Constants->getPI();
D.cout<<constants.getPI();和cout<<Constants::getPI();