Identify the correct sentence.


A. You parked your car on the sidewalk at a time when no parking at all was allowed. This is why you are getting a parking ticket.



B. You parked your car on the sidewalk at a time when no parking at all was allowed. That is why you are getting a parking ticket.



C. You parked your car on the sidewalk at a time when no parking at all was​ allowed, which is why you are getting a parking ticket.



D. You parked your car on the sidewalk at a time when no parking at all was allowed. So your ticket is for parking at the wrong time and in the wrong place.