What age must children be in a car seat according to California law?

Answer: B — Under 8

In California, the law requires that all children under the age of 8 must be secured in a car seat or booster seat in the back seat of the vehicle. This regulation is in place to enhance the safety of young passengers, as properly installed car seats and booster seats significantly reduce the risk of injury during a crash. Children must remain in a car seat or booster seat until they reach a height of 4 feet 9 inches or reach the age of 8, whichever comes first. This age requirement reflects the need to ensure that children are adequately restrained based on size and safety standards, rather than just age alone. While other age options might seem relevant, they are not as comprehensive as the correct choice, as younger ages do not adequately cover the safety measures outlined in the law.