Answer: Python Puzzler #1195

The answer is A. The program prints:

[6, 9, 12]
What the program prints
Checked by running the program for real.

Why?

range(6, 15, 3) counts from 6 in steps of 3 and stops before 15.

The code again

print(list(range(6, 15, 3)))

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