What are the child safety seat requirements?

Answer: C — Both a and b are correct

The requirement for child safety seats is based on a combination of factors, including the age of the child and their weight. This ensures maximum safety for young passengers in a vehicle. Children must be secured in appropriate child safety seats if they are under a certain age, typically under 4 years old. This is crucial because younger children are more vulnerable in the event of a crash, and regular seat belts are not designed to protect them adequately. Additionally, weight limitations are also a factor in determining the appropriate type of safety seat. Seats are designed to accommodate specific weight ranges to ensure that they provide effective restraint and protection. Thus, both the age and weight condition play a vital role in ensuring that children are safely secured while traveling in a vehicle. By emphasizing both requirements, this option captures the comprehensive safety measures that are necessary for child passengers.