Given the following java code

What is the result?

A$.$ peep

B$.$ back

C$.$ move

D$.$ Compilation fails.

E$.$ An exception is thrown at runtime

Given the following java code.

What is the result?

A$.$ Compilation Error at line $2.$

B$.$ Compilation Error at line $8.$

C$.$ Compilation Error at line $10.$

D$.$ Run without any problem.

E$.$ An exception is thrown at runtime.

class Animal $\{$ public String noise $()\{$ return "peep"

class Dog extends Animal $\{$

public String noise $()\{$ return "back"; $\}$