Answer: Python Puzzler #1185

The answer is C. The program prints:

[19, 21, 26, 29, 39]
What the program prints
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 = [26, 21, 19, 29, 39]
scores.sort()
print(scores)

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