You are able to ask your testers single and multiple-choice questions. Here are a few tips on how to set them up properly.
Make sure your question is written simple and clear enough to avoid any misunderstandings. Try to avoid questions that could be interpreted wrong by the tester.
Give all possible answer options to your questions - think about if an "other" or "i don't know" option is necessary to avoid testers giving an incorrect answer.
A Single Choice question means that a potential tester can only select 1 answer from your list, and if their selection is a correct answer, they will begin testing.
Just like single choice, questions for multiple choice should be clear and easy to understand. Give enough answer options so testers don't give answers that don't actually fit.
A Multiple Choice question means that a potential tester can select various answers from your list, and if their selection contains at least 1 correct answer, they will begin testing. If their answer contains both a correct and an incorrect answer, they will be rejected from the test.