When does a story's rising action begin? when the story itself begins, on the first page
when the most exciting event in the story happens
when something happens to develop the conflict
when readers know how all the conflicts are resolved

I believe the answer is: when something happens to develop the conflict

Explanation:

The rising action of the story is all of the events that lead to the eventual climax, including character development and events that create suspense. Climax. The climax is the most exciting point of the story, and is a turning point for the plot or goals of the main character.

Rising Action - Events in the story become complicated; the conflict is revealed.

Hope this helps!

3. When something happens to develop the conflict

Explanation:

I actually had this in my exam yesterday and got it right