Which sentence connects an element of a story to a theme?

The main character’s change from being overly critical to compassionate, helps readers understand. The empathy is needed to understand others.

The symbol of the butterfly helps readers understand the importance of change in a persons life

The story takes place during the early 1900 and helps her understand how women were treated differently during that time

The conflict between the main character and her mother helps readers understand typical relationships between parents and children.

The sentence that connects an element of a story to a theme is: "The main character’s change from being overly critical to compassionate, helps readers understand the empathy is needed to understand others."