Which of the following is the BEST clue to the theme of a
story?

The correct answer would be how characters respond to the main problem in the story.

It’s clear that they solve a problem in most stories, thus making it a theme to that particular story.

he believed that congress would be better not dealing with "lobbyists", or people who seek to influence (a politician or public official) on an issue, since historically, they had problems with these kinds of people. he thought lobbying produces benefits, but should be carefully monitored.