C is for:
Clicker-training – using an audible maker sound that is not easily mistaken for a natural sound to indicate that a reward is forthcoming. Aids in communcation, especially when used in conjuction with precesion and consistiency.
Commuication – two-way transfer of ideas. You have to learn your dog’s language and also teach your cues to them so they can understand what it is that you want. This includes body language and facial expressions.
Consistiency – conformity in the application of something, typically that which is necessary for the sake of logic, accuracy, or fairness. If you aren’t sure your dog understands concepts like logic and fairness you can test for it.