Question

Which sentence is punctuated correctly? A. The passenger train makes stops in: Boston, Hartford, and New York City. B. Josiah went to see a musical with: Natalie, Jaden, and Delilah. C. This warm-up exercise is useful for actors, singers, and public speakers. D. That piece of furniture is made of three types of wood pine, oak, and cedar.

Answer 1

A. you can't put a colon after in , you just can put a colon after of and some other words.
B. you can't also put a colon after with
C. good
D. you need to put a colon after of
So I believe that C is correct

Answer 2

C. This warm-up exercise is useful for actors, singers, and public speakers.