What does the method call echo("How are you?"); return for the following method?

public String echo(String message)
{
    return message + " " + message;
}

1. Correct Answer
   Incorrect Answer
   a

   This method is improperly written.

2. Correct Answer
   Incorrect Answer
   b

   How are you?

3. Correct Answer
   Incorrect Answer
   c

   message message

4. Correct Answer
   Incorrect Answer
   d

   How are you? How are you?

5. Correct Answer
   Incorrect Answer
   e

   How are you?++How are You?