Suppose you implement a heap (with the largest element on top) in an array. Consider the different arrays below, determine the one that cannot possibly be a heap.

(A) 7 3 6 4 2 5 1
(B) 7 6 4 3 5 2 1
(C) 7 3 6 2 1 4 5
(D) 7 6 5 4 3 2 1