Novel Broadcast:
The pace is set by the person reading it not hearing it
C. The sentence is interrupted for some detail, thus needs a comma
The correct answer is A. Earthly
Utilitarian and frivolous are antonyms, which means they mean the opposite. The opposite of metaphysical is earthly because metaphysics often deal with supernatural things or things that cannot be observed.
You will need to add the commas as follows:
I think Robert, Mary Jane, Andrea, Lee Ann, and Milton should be on the planning committee.
There are 4 commas.