I am working on a Macro where I want it to pause and ask the user to select the text in the document so it can be replaced and then once the user selects the document, user is asked with multiple choice of 5 options

Eg.
Option A ( should replace the selected text by inserting a.doc file)
Option B ( should replace the selected text by inserting b.doc file)
.
.
Option E ( should replace the selected text by inserting e.doc file)

How to go about doing this?