A、Take care of babies. B、Keep babies from danger. C、Keep an eye on babies. D、Offer a seat belt. C

About four million babies are born each year in the United States. Traditionally, new parents might have read a book or two about babies. But most of their advice probably came from their own parents.
    Today the newest and smallest Americans are at the heart of many industries. Some needs are still the same. Babies still need milk powder. But milk powder is just one thing on the shopping list.
    Babies and young children are big business. They have many needs, judging by one book from Parents Magazine. The book is called "Parents Baby Gear: Everything You Need to Clothe, Feed, Transport, Protect, Entertain and Care for Your Baby from Birth to Age Three. "
    There is enough advice to fill more than 170 pages, from the right clothes to the right toys to the right car safety seats. There is even advice about how to choose a three-wheeled bicycle.
    Parents now have more choices of equipment to help keep their child safe. One example is the baby monitor.This device lets a parent listen to a child sleeping or playing in another part of the house.Another example is the automobile safety seat. In the past, babies often rode in the arms of adults. Or they wore adult seat belts.
    Now, all 50 states require that babies under 18 months of age ride in safety seats to protect them. Some states require special seats for children up to a few years old.
23.What does the speaker say about milk powder today?
24.What can be inferred from Parents Magazine?
25.What can a baby monitor do?