The question shown in the screenshots below have an incorrect answer.
The correct answer should be A. And it is formatted incorrectly. It should be -21,600
Hi Tiffany,
Thank you for letting us know! We now have a way to flag an item that may contain wrong answer choices.
Check out this guide:
https://community.canvaslms.com/t5/Mastery-Connect-Item-Authoring/How-do-I-flag-an-item-in-a-Mastery-Item-Bank-or-Mastery-Item/ta-p/599070