In the Following Code, Which Line Will Cause a Compiler

Multiple Choice

In the following code, which line will cause a compiler error? Line 1 public class ClassA
Line 2 {
Line 3 public ClassA() {}
Line 4 public int method1(int a) {}
Line 5 public final int method2(double b) {}
Line 6 }
Line 7 public ClassB extends ClassA
Line 8 {
Line 9 public ClassB() {}
Line 10 public int method1(int b) {}
Line 11 public int method2(double c) {}
Line 12 }

A) Line 4
B) Line 5
C) Line 10
D) Line 11