运行以下代码:public class TestPoly｛public static void main(String[] args){ Parent p=new Child( ); }}class Parent{ public Parent( ){super( );System.out.println(“instantiate a parent“);}}class Child extends Parent{ public Child( ){System.out.println(“instantiate a child”);}}运行结果是（ ）。 A、instantiate a child B、instantiate a parent C、instantiate a child instantiate a parent D、instantiate a parentinstantiate a child