public interface Stack { /** * Returns the number of elements in the stack. */ int size(); /** * Tests whether the stack is empty. */ boolean isEmpty(); /** * Inserts an element at the top of the stack. */ void push(E e); /** * Returns, but does not remove, the element at the top of the stack, or null if the stack is empty. */ E top(); /** * Removes and returns the top element from the stack, or null if the stack is empty. */ E pop(); } 

Consider the following sequence of operations on a Stack that begins empty. Give the return value for each line. If it causes an error, then write ERROR.

push("A")

push("B")

pop() // FIRST

top() // SECOND

push("C")

pop() // THIRD

pop() // FOURTH

pop() // FIFTH

Group of answer choices

FIRST

[ Choose ] true false C null A B

SECOND

[ Choose ] true false C null A B

THIRD

[ Choose ] true false C null A B

FOURTH

[ Choose ] true false C null A B

FIFTH

[ Choose ] true false C null A B