Which of the following is correct?

Select one:

a. Linked-List can be used to implement both Stack andQueue.

b. None of the other answers

c. Linked-List can be used to implement Stack, but notQueue.

d. Linked-List can be used to implement Queue, but notStack.

Given Queue with elements A,B,C,D,E: Left/Rear [A,B,C,D,E]Right/Front

Applied Operations in order: Enqueue(X), Dequeue(), Enqueue(Dequeue() )

Given the above case, what is final Queue?

Select one:

a. None of the other answers

b. [A,B,C,D,E]

c. [E,X,A,B,C,D]

d. [X,A,B,C,D]

Given a "balanced" string below with balanced symbol-pairs [ ],( ), < >:

"A [? S D ( A [ X Y ] A ) < ? > D ]"

Which of the following character-pairs could be "?" above?

Select one:

a. "<" and ">"

b. "[" and "]"

c. All of the other answers

d. "(" and ")"