The success of a country in the New Age of Superstuff lies in________.

A．participation in interesting activities relating to a school subject improves one' s achievement in that area
B．teachers should occasionally make home visits to parents
C．too many children are lazy and have poor work habits
D．only a small part of the school day should be set apart for drilling arithmetic

A．parents have a responsibility to help students to do their homework
B．home training is more important than school training since a child spends more time with parents
C．parents exert a subtle influence on children's character
D．a student spends more time with their parents than with their teachers