According to the following UML, if a new object of B is created in main as follows: B myB = new B0; Which of the following statements is NOT valid in main? A my -2 + do stufo do_stuff20 do stuff30 B. do tutto 10.D. stutt20 dos stutto das 20 myB.do_b_stuff10); myB.do_b_stuff20; O myB.do_stuff10): myB.do_stuff30)