根据短文内容，选择正确答案。

You are what you eat

Keeping better eating habits can help you reduce (减少) disease. A healthy eating plan means choosing the right food to eat and preparing food in a healthy way.

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Do you often change your toothbrush? Maybe you think it is not necessary. A study shows old toothbrushes bring disease. You should often change your toothbrush.

Exercise

Swimming, running, skating, skiing, dancing, walking and some other activities can help you stay healthy. You should exercise at least three times a week and for twenty minutes or more each time. Do it.

Plan out your life

You should have breakfast before you go to school. Have a proper (合适的) meal for lunch. Follow a healthy diet.