Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Which of the following is NOT the reason for people to oppose year-round schooling

A．Some evidence shows that year-round schooling improves learning.
B．It is hard for families to organize activities.
C．Summer camp sponsors would find it hard to operate their business.
D．Some parents want to release the pressures of school for their children.