Question: To prevent cookies from burning.
Options:
Your baking pans should be light colored rather than dark. Cookies baked on dark pans will tend to burn on the bottom.
Your baking pans should be light colored rather than dark. Cookies baked on dark pans will tend to burn on the top.
Answer: Your baking pans should be light colored rather than dark. Cookies baked on dark pans will tend to burn on the bottom.