@Abbie, I am sorry but in your article I found only this:
"4. Indicate -> the correct ANSWER <- by pressing the bubble next to -> ONE <- of the multiple choices."
And I need to make -> several correct answers <- in one question! Is it possible?
Try to put all possible solutions in your question, and then reference only the correct number of solutions in one of the possible choices. For example: What colors form part of the rainbow?
1. a, b, c
2. a, c, d
4. only c
Here you have multiple correct answers, but only solution 2 can be chosen. This will fix your problem!