The answer is A. The program prints:
[10, 17, 30, 31, 35, 42]
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 = [10, 42, 17, 30, 35, 31]
scores.sort()
print(scores)
Try it: change one number in the program and predict the new output before you run it.