Given the question: I'm taking a test and have to guess the right answer to the question after the article. Article: As children begin to head back to school, there are several things that you can do to make sure that your child stays healthy and performs at their peak potential during the school year. 1. Make sure your child is up to date on their immunizations . The summer is a good time to schedule visits to the doctor's as your child is not in school, and the visit won't require that your child miss school days. 2. Encourage proper nutrition. America faces childhood obesity . This means that the percentage of overweight children is increasing each year, and this will place your child at risk of developing a variety of diseases when they are middle age or even young adults. You can start helping your child to become healthier by offering fruits and vegetables at home instead of calorie heavy potato chips and candy. 3. Get your child involved in sports activities. Activities in high school such as track and cross-country are important for socialization for your child, as well as helping to improve their health. You can get your child interested in wholesome activities by discussing with them how you enjoyed similar activities in high school. 4. _ . Many children become sexually active in junior school and senior high school, and the sooner you discuss sex with your child the sooner they will be prepared. Tell your child that there is always the possibility of infecting a sexual disease when two people have sex; and discuss with your child the use of condoms. The sooner you start having this embarrassing situation the better. 5. Know your child's friends. You can do this by inviting your child to bring their friends over to your house for a pizza night, or by chatting with them when they stop by your house. If you find your child's friend has a bad reputation, then you could consider introducing your child to a different network of people, such as through the girl/boy scouts. Forbidding your child from seeing a certain person may only lead them to rebel and become closer to that person. 6. Discuss with your child the... Question: The first three tips focus on children's _ . Options: A: medical care B: nutritious food C: physical health D: sports activities
The answer is:
C