Which sentence does not use a colon correctly?

a.
the art appreciation course explores these artists: claude monet, leonardo da vinci, and vincent van gogh.

b.
these gift bags are for: mrs. hernandez, mr. rollins, and miss crane.

c.
here's what we have to do: fold your clothes, find the suitcases, and pack for the trip.

d.
we need the following information: names of the guests, table number, and luncheon choice.