You are driving a 6-year-old who weighs 50 pounds and is 4 feet 2 inches tall. How must the child be secured?

Correct answer: In a child passenger restraint system or a booster seat

Why

A booster seat raises a child so the lap belt sits low on the hips and the shoulder belt crosses the chest instead of the neck. Missouri requires a child restraint for children under 4 or under 40 pounds, a restraint or booster for children 4 to 7 who weigh 40 to 79 pounds and are under 4 feet 9 inches, and a belt or booster once a child reaches 80 pounds or is taller than 4 feet 9 inches. The guide also advises that children 12 and under ride in the back seat.

Verified against Missouri Driver Guide · Child Passenger Restraint Law · p. 57, 58