【填句补文】All children in the United States have to receive an education, but the law does not say they have to be educated at school. A number of parents prefer not to send their children to school. ________. There are about 300,000 home-schoolers in the United States today.
A
Critics also say that most parents are not well qualified to teach their children.
B
In some countries, however, children are educated by their parents.
C
Learning starts with the children's interests and questions.
D
Children who are educated at home are known as "home-schoolers."
