To allow multiple answers to be entered in a short-answer question, use * (wildcard) when you make the question.
EX.
Question: What are the three states of a substance?
Answer: Solid, liquid, gas
(Note) It is recommended to use when the number of correct answer number is fixed to two or three.
(Note) In the case of entering 2 or 3 of the multiple answers that can be correct (EX. 2 red fruits), you should fill out more possible answers because there are many cases that can be correct.