To find the median you must first put them in order from least to greatest.
3, 5, 23, 27, 35, 37, 39, 45, 48
Now take a number from each side
5, 23, 27, 35, 37, 39, 45
Again
23, 27, 35,37, 39
Again
27, 35, 39
Once more
Resulting in the answer being
A. 35