Two types of questions that you may encounter are the Multiple Choice $($MC$)$ and Multiple Select $($MS$)$ modules. While the two question types are very similar, the key difference is that there is only one correct answer to Multiple Choice questions, while Multiple Select questions call for you to choose all the correct options from a set. MC questions will only allow you to select one answer choice, while in MS questions you will be able to select more than one.

There is also a subtle visual difference between MC and MS: In MC questions, you click a circle next to your preferred answer, but in MS questions, you check boxes.