Question

which event is part of the exposition in \cinderella\?
the slipper fits cinderellas foot.
a fairy godmother appears to cinderella.
the prince and cinderella get married.
an invitation to the princes ball arrives.

Explanation:

Exposition in a story sets the scene, introduces characters and the initial situation. The arrival of the invitation to the prince's ball is part of setting up the situation that leads to the main events. The other options are later - in the rising action or climax (fairy godmother appearance), or the resolution (slipper fitting, marriage).

Answer:

An invitation to the prince's ball arrives.