Which sentence below uses a
 colon correctly?
 A. There are some good things to do before a
 test: get a good night's rest, eat breakfast, be on
 time.
 B. For the test, please: get a good night's rest,
 eat breakfast, be on time, bring an extra pencil.
 C. Before the test, remember to: get a good
 night's rest, be on time, bring an extra pencil.