Gregmat Question - Slight Discrepancy

Hey! So, I was attempting the ‘Foundation Easy Level Quiz 2’, and came across this question that I am attaching below. In the solutions video, Greg states that the answer is actually A, since 2^4=16, therefore k=16 (which was my logic as well). However, in another choosing numbers video, we are presented with the same question again, and Greg states that n could be anything, including 0 in which case it wouldn’t matter what ‘k’ is.


Which logic should I go by, if the questions are completely the same without any restrictions for n given? And yep, the answer in the solutions video to the one marked on the same quiz is different too.

The answer is D, not A. Greg did correct this later in the video.

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