What will be the output of the following Java program?

class Output
{
    public static void main(String args[])
    {
  char a = '@';
        boolean x = Character.isLetter(a);
        System.out.print(x);
    }
}

A. A contract specifying a set of methods that a class must implement B. A class that cannot be instantiated C. A class that contains only static methods D. A subclass of the Object class

A. Interfaces cannot be implemented by classes B. Only abstract classes can implement interfaces C. No, a class can only implement one interface D. Yes, a class can implement multiple interfaces

A. class B. abstract C. interface D. extends

A. To declare abstract methods B. To provide a base class with common methods and fields C. To make a class final D. None of These