If you disagree with the mark your professor assigned, meet with your professor to discuss it.
If you remain dissatisfied, you may apply for a Review of Assigned Standing.
The completed application form must be submitted to Enrolment Services, main floor of Brock Hall, no later than July 15 for the Winter Session, and not later than October 15 for the Summer Session.
You will have to pay a fee (normally $52), which will be refunded only if your grade is raised. The review can take up to four weeks to process, and you will be informed in writing of the results.
Visit the UBC Academic Calendar for full details.