Which of the following statements in Java will compile and execute successfully without violating keyword usage rules?

1. Aboolean null = false; System.out.println(null);
2. Bint static = 10; System.out.println(static);
3. Cfloat goto = 2.5f; System.out.println(goto);
4. Dint _for = 5; System.out.println(_for);