Final answer:
Information stickers fixed to exterior entrances in an operation should be large and colorful to catch attention and ensure visibility.
Step-by-step explanation:
When it comes to information stickers fixed to exterior entrances in an operation, they should be large and colorful to be easily seen and catch attention. The purpose of these stickers is to provide important information or instructions, and using vibrant colors and a larger size can help ensure that people notice and read them. For example, stickers with important safety information or emergency procedures may need to stand out clearly to ensure that people are aware and follow the instructions.