Devin Is a 5-Year-Old Who Is a Very Picky Eater

Devin is a 5-year-old who is a very picky eater. Devin's mother is very concerned about his picky eating habits. Devin has recently not been eating his normal volume of food, and he has only been eating a few of his favorite foods.
Devin is also physically inactive and spends most of his free time watching cartoons or playing on the computer. Devin's father feels comfortable with Devin's current level of physical activity; however, Devin's mother feels that he needs to get more exercise to help develop good lifestyle habits for the future. Answer the following questions to help Devin's parents learn more about childhood nutrition and fitness guidelines.
It is recommended that Devin must be physically active for at least _____ minutes daily.

A) 20
B) 30
C) 40
D) 50
E) 60