Which sentence contains parallel parts?
a) In the business world, you must write clearly and with conciseness.
b) I would rather drive a car than ride a bike to work.
c) Joan is a member of the internal audit committee, a team ;eader, and plays on the company softball team.
d) The seminar speaker's talk was motivating and challenged us.
My answer d) ?
This question involves selecting which sentence contains parallel parts.