Which of these best describes passenger-restraint laws for young children? A. Children under four years old and under a certain weight must
have their own air bags.
B. Children under nine years old and over a certain weight must use a
special child seat.
C. Children under four years old and under a certain weight must use
a special child seat.
D. Children who are at least four years old may wear a seat belt
instead of using a restrained child seat.