The answer is A. The program prints:
CCC AAA TTT
Why?
A for loop can go through a string one letter at a time. Each letter is printed 3 times in a row.
Trace table
A trace table follows the program step by step. Here’s this one:
| letter | printed |
|---|---|
| C | CCC |
| A | AAA |
| T | TTT |
The code again
for letter in "CAT":
print(letter * 3)Try it: change one number in the program and predict the new output before you run it.