Please choose the correct solution to the question: How can you get free Krispy Kreme donuts?

Solution1: The bottom of every receipt has a survey, if you fill out the survey you get a free donut, you can eat like this for a long time.

Solution2: The bottom of every receipt has a survey, if you fill out the survey you get a free napkin, you can eat like this for a long time.

Answer format: solution1/solution2
Answer: solution1