Question: In an array-based chain implementation of a Stack ADT, what is the performance of the ensureCapacity method when the array is not full? A. O(1)

In an array-based chain implementation of a Stack ADT, what is the performance of the ensureCapacity method when the array is not full?
A. O(1)
B. O(n)
C. O(n log n)
D. O(n^2)

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