Mark Twain's wit and humor flowed effortlessly through his fiction writing, his nonfiction writing, and when he commented on public issues.
Which is the CORRECT way to revise this sentence?
A. Mark Twain's wit and humor flowed effortlessly through his fiction writing, writing nonfiction, and when he commented on public issues.
B. Mark Twain's wit and humor flowed effortlessly through his writing of fiction, nonfiction writing, and when he commented on public issues.
C. Mark Twain's wit and humor flowed effortlessly through his fiction writing, his nonfiction writing, and his public commentary.
D. No change