how many windows would exist in an array with N elements and window size K a)N+K+1B)N-K-1C)N-K+1D)N+K-1

The number of windows that would exist in an array with N elements and window size K is given by the formula N-K+1. So, the correct answer is C) N-K+1.

Here's the step-by-step explanation:

1. Suppose you have an array of N elements.
2. You want to create windows of size K from this array.
3. You can create the first window by taking the first K elements.
4. To create the next window, you slide the window one element to the right.
5. You can keep doing this until the last element of the window reaches the last element of the array.
6. The number of windows you can create this way is the total number of elements N minus the size of the window K, plus one (because you can make a window starting at each of the first N-K+1 elements).

So, the answer is C) N-K+1.