Which of the following is valid in Java, if a class XYZ is a directed superclass of ABC and XYZ is a "directed" subclass of EFG (suppose they all have no-argument constructors)?

Select one:

a. XYZ b = new ABC();

b. EFG c = new XYZ();

c. EFG a = new ABC();

d. All of the other answers

this.aM = this.aF(); Given the above valid statement, which of the following is correct?

Select one:

a. None of the other answers

b. This statement assigns a variable with a value of int data type .

c. This statement includes a method calling with return type void.

d. This statement must be in a method body of the class itself.