Read this passage. Childhood obesity is a serious problem in the United States putting children and adolescents at risk for poor health. This is due to unhealthy diets and limited activity in teenagers. Obesity among children and adolescents is still too high.

For children and adolescents aged 2–19 years, the rate of obesity was 18.5% and affected about 13.7 million children and adolescents.

–Child Obesity Facts, Centers for Disease Control

Which research topic would this passage best support?

Teenagers need to get more exercise.
Video games are beneficial to children.
Teenagers have more healthy food options.
The number of overweight adults is increasing.