The answer is C. The program prints:
[5, 17, 31, 36, 39, 45]
This answer was checked by running the program for real.
Why?
sort() puts the list in order, smallest first. It changes the list itself.
The code again
scores = [17, 31, 45, 36, 39, 5]
scores.sort()
print(scores)
Try it: change one number in the program and predict the new output before you run it.