Given the following class definitions, which of these statements are TRUE? Select ALL $.$ which apply.

public class Parent $\{$

protected String familyName;

private long so$$ialSecNum;

$$

public class Child extends Parent $\{$

protected char mathGrade;

public class GrandChild extends Child $\{$

private static int numGrandChildren;

$$

choose one option below

this.familyName CAN be used from within a private instance method of the class GrandChild.

this.mathGrade CAN be used from within a public static method defined in the class GrandChild.

this. familyName CAN be used from within the constructor of the class GrandChild.

this.socialSecNum CAN be used from within the constructor of the class Child.