Questions 18 to 20 are based on the following passage. In his lifetime, Sandburg had NEVER been

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.

A. in the afternoon.
B. in the morning rush hour.
C. in a park in Kultury.
D. in North Caucasus region.