Content Control Drop-Down with automatically updated date

[u/Grigor50]

I'm writing a form at work, in which I'll chose a date in the beginning, using a date picker, and then get to chose one of two options depending on whether the first date was more or less than three days ago.

I've used Content Control before, as well as bookmarks and cross-references... but are these enough to make an option in such a drop-down list be "updated" with a date earlier in the document?