I have a survey that I want to use choice filters for four dropdowns. The last dropdown is a large list and I read if there are over 500 choices then it should be an external list. I've ready about external selects and external choices but I am not sure which one to choose. I tried using select_one_from_file but when the survey updated everything was blank. I tried adding external_choices tab but I couldn't get that to work either. Pardon me as I've only been using Survey for a few weeks now.
I already have it setup so the first dropdown changes the options for the second dropdown and I can use the same coding to filter the third. I am not sure how to setup the fourth option considering there is almost 1000 choices.
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