I think the answer to your question would be C it sounds like your having trust issues with your mom.
After the use, but before the disposal of the sharps device is the next leading cause to sharps injuries.
C. Keep materials in unlabeled containers
Do daily challenges such as doing as many pushups as you can one day and the next moving on to how many squats, in this day in age you can find many apps to work out at home with no equipment and for free.