How does the nose end up on major kovaloff's face again?
a. it just suddenly reappears there.
b. major kovaloff holds it in place.
c. a doctor surgically reattaches it.
d. major kovaloff glues it back on.

It just suddenly reappears there. After all kinds of farcical events and occurrences, with the nose coming and going, disappearing and having a will of its own, Kovaloff wakes up one morning and finds the nose in its old place. Kovaloff can now go on with his life, feeling no shame in front of the barber and all the girls he had been chasing.

D. The conversation you write must sound natural for the characters.
More natural conversations between characters make your writing more fun to read. Reading a dialogue that sounds like it could actually happen engages the reader, and creates an investment in the characters themselves. Think of it this way, would you rather watch a movie with good acting or bad acting?