How do i make multiple documents in one HTML file?

For example. say i had this:

"Hello! please chose a chapter"
C1
C2
C3

Ect. BUT. the person CANT see the info the chapter shows until they click it. and when they do. the other text goes away and the new text comes up. how do i do this? I'm trying to make a Choose Your Own Adventure story.

please help.

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