Answer: Python Puzzler #856

The answer is C. The program prints:

[37, 35, 30, 29, 23, 12]

Checked by running the program for real.

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

scores = [29, 23, 35, 30, 12, 37]
scores.sort(reverse=True)
print(scores)

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