When an object of one class is a data field within another class, they are related by O a extension O b.scope O c. composition O d. is-a QUESTION 29 It is illegal to declare the same variable name more than once within a block True O False QUESTION 30 If a class's only constructor requires an argument, you must provide an argument for everyof the class that you create O b object d type QUESTION 31 The reference to an object that is passed to any objects nonstatic class method is caled the a magic number