下列两个类分别定义在各自文件中? 1. public class Testl { 2.public float aMethod(float a, float b) throws 3. IOException {... 4. } 5. } 1. public class Test2 extends Testl { 2. 3. } 在类Test2的第2行能插入以下哪个方法? A、float aMethod(float a, float b) {...} B、public int aMethod(int a, int b) throws Exception {...} C、public float aMethod(float a, float b) throws Exception {...} D、public float aMethod(float p, float q) {...}