In British Columbia, a child must use a booster seat until at least:

Question: In British Columbia, a child must use a booster seat until at least:

Answer options:

• Age 4 ✅ Age 9 or 145 cm
• Age 12
• Until parents decide

Correct answer: Age 9 or 145 cm

Explanation: Under British Columbia's Motor Vehicle Act, children must use a booster seat until they are at least nine years old or reach 145 centimeters in height. This requirement ensures that standard adult seatbelts fit safely across a child's collarbone and hips to prevent injury. Age four is incorrect because that is typically when a child graduates from a forward-facing seat to a booster seat, while age twelve is far past the minimum legal requirement. Leaving the decision to parents is wrong because safety seat laws are legally mandated. Memorizing these specific age and height thresholds is critical for the ICBC knowledge test, where child passenger safety rules are commonly examined.