Question: In the first version of heap sort, given an array having n elements, the running time to build a heap is a . O (

In the first version of heap sort, given an array having n elements, the running time to build a heap is
a.
O(logn)
b.
O(nlogn)
c.
O(1)
d.
O( n )
e.
O(n^2)

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