Thomas is writing a persuasive essay calling for more people to participate in recycling and carpooling. One of his paragraphs starts with the following topic sentence: Carpooling is an effective way to save money as well as help the environment.

What type of detail would be best to support this topic sentence?

Aanecdotes about people who have chosen to carpool

Bdiscussion of how carpooling can be a fun, if challenging, activity

Cstatistics that show how many cities currently encourage carpooling

Dstatistics that show lower pollution levels in cities with carpooling