Which sentences use a colon correctly? choose all answers that are correct. a. pack the following: a sleeping bag, a change of clothes, and a flashlight. b. these books are for: ralph, jessica, and craig. c. her favorite colors are: green, blue, and purple. d. our bus will stop in these cities: knoxville, atlanta, and tallahassee. e. whales primarily consume four sources of food: shrimp, larvae, plankton, and krill.