Declaration checkboxes with text-box response using Storyline block in Rise course

Background:

• We are using Rise for rapid course creation on a risk and compliance topic and uploading to our LMS. 
• There's a quiz included and the learner must attain 80% to progress to the final stage of the course (the declaration). Don't require results to be sent to LMS but would be nice.
• My internal client wants the completion criteria for the course to be the completion of a final declaration section that learners must agree to at the end of the training

The declaration they want to include roughly needs to read:

'I declare the following:

• • • I understood the content and will follow the procedures mentioned [Checkbox]
    • I have disclosed all potential conflicts to the risk department [Checkbox]

If you are unable to agree to both check-boxes above, please include information about any relevant matters in the text box below:

[Textbox]'

• They want to be able to use our LMS to report on the learner's responses to both declaration statements and what is entered into the optional text box (if anything is.)

My question/s:

Given that Rise can only send data on quiz question answers to the LMS, and doesn't have a textbox question option, I figured the only option is to create the Declaration / TextBox interaction in a Storyline slide, and have course completion in Rise set to be based on completion of the Storyline block.

However:

• I have only ever created Quiz interactions in Storyline. Would I need to use form questions instead? Where can I find guidance on this?
• Can I make the first statement mandatory for the learner to select, then set it so that EITHER the second statement must be agreed to, OR the text box must be completed?
• Before I start creating the slide in Storyline, can someone please confirm my assumption that it is possible for a Storyline block in a Rise course to report text feedback?

Alternatively, if there's a better way to achieve this I haven't thought of, please do share! I did consider using an iFrame to MS Forms for this section but in other courses where we have taken this approach, about 10% of our learners see a grey box with 'login.microsoftonline refused to connect' instead of seeing the form, and our IT dept are unable to ascertain why, which results in a lot of confusion queries and admin to support the 10% affected.