A stack is implemented with an array of ‘A[0…N – 1]’ and a variable ‘pos’. The push and pop operations are defined by the following code.

push (x) A[pos] ← x pos ← pos – 1end pushpop ( ) pos ← pos + 1 return A[pos]end pop 

Which of the following will initialize an empty stack with capacity N for the above implementation ?
(A) pos ← –1
(B) pos ← 0
(C) pos ← 1
(D) pos ← N – 1

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