This article explains how to make bonus questions in D2L Quizzes.
Making a Question a "Bonus"
Navigate to the "Add/Edit Questions" screen for the quiz. Select the questions that you want to be bonus items and then click "Edit Values."
Select the boxes in the “Bonus” column to mark those questions as bonus. You can also adjust the point value for each question, if desired. Be sure to click “Save.”
When you return to the question screen, you will see the questions marked as “bonus” by a green check mark.
Click "Done Editing Questions" to return to the quiz setup page. Click "Save and Close" to apply the changes.