dia- = "with"

log = "word"
pro- = "before"

Which sentence uses the underlined word correctly?

Erika wrote a dialogue for the beginning of her book explaining what inspired her to become a novelist.
The prologue between the two main characters on stage provided hints about which one of them had committed the crime.
The prologue in the book club got very heated as the classmates debated which book to read next.
Shelly started a dialogue with her coworkers about how to handle the problems the company was facing.

The correct sentence is: "Shelly started a dialogue with her coworkers about how to handle the problems the company was facing."

The sentence that uses the underlined word correctly is: "Shelly started a dialogue with her coworkers about how to handle the problems the company was facing."