Valera, a tour operator shows up to work and appears "under the influence" and mentions that she has just smoked marijuana. She is about to get into the driver's seat of the bus. What should you do$?$

A$.$ Notify your supervisor right away.

B$.$ Talk to Valera and encourage her to go home and not drive the bus.

C$.$ Both A & B

D$.$ Don't do anything. It's none of your business.