Question

In using a colon to introduce a list, be sure the clause before the colon is a complete sentence (can stand alone). 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.