When you sign your application (online), you are indicating that all of the information on the application is the truth. Among US universities, dishonesty is a BIG deal. The universities don’t like lying, plagiarism, cheating, or stealing. Because you are an adult, depending on the charges, you could also be charged by law enforcement. Losing a student visa would be the least of your problems. You lie, you WILL get caught.
Be honest and don’t exaggerate, embellish or omit grades from your application. You do that and any future candidates from your local school and province will not be considered for admission anywhere in the US.
The US universities/colleges have a national clearinghouse. It will be really difficult for you to get an education anywhere near the US if you lie. The colleges will flag your file in the clearinghouse. If you try to apply to other colleges, the flag will indicate why you were flagged and no college will admit you.