How to segment my existing subscribers?

Hey all, I have the following issue:
I have a list of many subscribers. However, I am not sure which of our two solutions are they interested in - A or B.

I want to send them an email asking “Are you interested in A or B”, so I can segment their type and send them relevant newsletters through Shopify’s Email feature.

Ideally, I want them to have a choice to click on two buttons “I am interested in A” or “… B” that would do their magic and my subscribers wouldn’t need to fill-in forms again.

I did a lot of searching on the topic, but didn’t manage to find the right answer. Can you please help me?

Best regards,