类Student的声明如下:  <br /> package com.school class Student{ String name; <br /> int age; <br /> Student(String name,int age){ <br /> //code } void study(String subject){ /<br /> /code } } <br /> 正确调用方法study(String subject)的是哪项?() 
A、Student stu = new Student(“Tom”,23); stu.study(“数学”);
B、Student.study(“数学”);
C、Student stu = new Student(“Tom”,23); stu.study();
D、Student stu = new Student(“Tom”,23); String result=stu.study(“数学”);