I want to convert Select box into List collector. Those choices are new. How should I do?

[AbdurRahmanSnow]

Good morning.
I have a Catalog Form on which, for a question, we have choices (Select box type). But user wants to select multiple choices. How can we do this? 
I know, one method is, we can go with check-boxes. But how can we go with List collector? 
Should I create a new table and then link it? If yes, how can I create a table and link them?
Please help...

[AbdurRahmanSnow · Accepted solution]

Got the answer. Thank you @ezrahortensius. Simple and straight forward. Insightful.