It can be referred from the passage that Alice Walker was twenty-two years old when she moved to Jackson, Mississippi.

A．Yes, the company has done so because it is an order.
B．Of course, the company has done so although it is reluctant.
C．No, the company has not yet done it.
D．We could not judge from the passage.

A．explain how Kitty Litter is produced
B．describe the Mine Safety and Health Administration
C．show how tidy cats are
D．show that the government can sometimes be a nuisance