Which sentence does not use a colon correctly?
a. These packages are for: Mrs. Carty, Miss Cohen, and Mr. Deller.
b. Here's what you have to do: put gas in the car, pick up some milk, and fold the laundry.
c. The science fiction course includes these authors: Madeleine L'Engle, Ursula K. LeGuin, and Ray Bradbury.
d. We need the following information: name, address, and telephone number.