Answer: Python Puzzler #3087

The answer is D. The program prints:

[41, 39, 25, 14, 9, 7]

This answer was checked by running the program for real.

Why?

sort() puts the list in order, smallest first. reverse=True flips it, so the biggest comes first. It changes the list itself.

The code again

scores = [39, 41, 25, 14, 7, 9]
scores.sort(reverse=True)
print(scores)

Try it: change one number in the program and predict the new output before you run it.