Which sentences use a colon correctly?

choose all answers that are correct.

a.
these books are for: ralph, jessica, and craig.

b.
whales primarily consume four sources of food: shrimp, larvae, plankton, and krill.

c.
her favorite colors are: green, blue, and purple.

d.
our bus will stop in these cities: knoxville, atlanta, and tallahassee.

e.
pack the following: a sleeping bag, a change of clothes, and a flashlight.

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.

can you tell me the answers to this