问题详情

A．One caregiver for eight 4-or-5-year-olds is enough.
B．The most important thing parents can do to raise a good reader is to hold and play with the baby.
C．A baby will develop a brain 20% to 50% smaller than normal if he is rarely talked to or held.
D．Caregivers should know first aid and know how to take care of sick children.请帮忙给出正确答案和分析，谢谢！