Which sentence uses a colon incorrectly?

A) In our pottery class we made: big salad bowls, medium soup bowls, and small little tea cups.
B) The detective had several suspects in mind: the butler, the maid, the yardman, and the chauffeur.
C) Please pack the following for our hike tomorrow: granola bars, water bottles, sunscreen, and bug spray.
D) Rollie felt so many emotions when he saw his movie on the big screen: elated, nervous, happy, and exhausted.

Bicycle riding should be encouraged, and adding bicycle lanes will increase the number of riders. it is healthier for people to ride than to sit angrily in traffic. it is healthier for everyone to breathe cleaner air. sharing the road can be tricky, but there are things that can be done. so, add the bike lanes and get rolling! which sentence would improve this conclusion? every town should consider adding bicycle lanes, because it is a great idea. organizing safety classes for drivers and cyclists will ensure that everyone knows the rules. do not listen to negative people who complain about anything new. it is true that some people might get injured, but even walking can be dangerous.