单选题：Given code below:

Given code below:
```Java
interface I { void f(); }
abstract class C implements I {}
```
Which code below compiles? @[B](2)

A. `class A extends I { void f(); }`
B. `interface A extends I { void f(); } `
C. `class A extends C implements I {} `
D. `interface A implements I { void f(); }`





A.`class A extends I { void f(); }`
B.`interface A extends I { void f(); } `
C.`class A extends C implements I {} `
D.`interface A implements I { void f(); }`


答案：B