Answer:
D
Explanation:
Median = The middle number ( in terms of value )
So the first step is usually to put the set of numbers in order from least to greatest but they have already done that for us
That being said all we have to do is find the middle number
In the set, 10, 18, 21, 25, 31, 33, 36
the middle number would be 25
therefore your answer is D