Question 5 which statement best describes the difference between a protagonist and antagonist? a. a protagonist is always a round character, while an antagonist is always a flat character. b. a protagonist never changes from the beginning of a story to the end of a story. an antagonist, however, can change and become more likeable. c. the protagonist and antagonist are both main characters, but the protagonist is the only character who holds the reader's interest. d. a protagonist is the main character, whom the reader likes and wants to succeed. an antagonist struggles to keep the protagonist from being successful.