What are the purposes of a prologue in a play?

to provide information about the inner thoughts and feelings of a character
to set the mood and tone of the play and provide background information
to provide information about how the stage should be set and what props are needed
to give some insight into the relationships among different characters
to provide a hint to the audience about what will happen later in the play

to set the mood and tone of the play and provide background information

to give some insight into the relationships among different characters

Explanation:

A prologue will work as an introduction. It will provide you general information for you to understand at least generally what is going on during the play when it begins. It can also provide some insights that will help you to understand better the behavior and relationships of characters and even how to feel in some scenes.

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are there multiple choice options?