I'm creating a questionnaire for multiple schools. For a multiple-choice question, I want to display different (and sometimes the same) answer options for each school. I want the schools to receive a unique access link or code that will automatically show them the correct set of answer options. After hours of discussing this with Gemini without a solution, I'm now asking here.

Assuming you don't want to use tokens, you can insert a hidden question for the school ID and preload it using GET parameters in the survey URL - www.limesurvey.org/manual/URL_fields/en

Having done that, simply filter the possible answers with sub-question relevance.

I think tokens would be the way to go. You can create custom attributes in the token table that you can call from throughout the survey and use in conditions and subquestion relevance to hide and show questions / subquestions.

Unfortunately there is no "answer option relevance" for single choice questions, in this case you would have to go through a construct of multipunch questions and the array filter.