The answer is D. The program prints:
[7, 20, 21, 33, 38, 48]

Why?
sort() puts the list in order, smallest first. It changes the list itself.
The code again
scores = [7, 33, 38, 20, 21, 48]
scores.sort()
print(scores)
Try it: change one number in the program and predict the new output before you run it.