Please choose the correct solution to the question: How do I keep track of my menstruation?

Solution1: Keep a small spoon and a red pen in your nightstand, when your period starts, mark the spoon with a red x on the days you menstruate, that way you can tell how long it is from one period to another.

Solution2: Keep a small calendar and a red pen in your nightstand, when your period starts, mark the calendar with a red x on the days you menstruate, that way you can tell how long it is from one period to another.

Answer format: solution1/solution2