Answer: Python Puzzler #2873

The answer is B. The program prints:

[43, 37, 23, 8]

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 = [37, 43, 8, 23]
scores.sort(reverse=True)
print(scores)

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