This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to clean a dog's wound
Calm the dog down.
Once you notice that your dog is injured, get control of him and calm him down if he's over-excited. Soothe your dog by petting him gently and speaking to him in a low, calm voice.

A. Then, take a clean toothbrush and get some water and soap. Apply the rubbing alcohol to a clean cloth or gauze. B. Reassure him that his wound is healing and you'll be able to help him. This should not take too long, but it is important to get comfortable with your dog and get on your hands and knees so that you can make a gentle touch that will not seriously injure your dog. C. Make sure to stay calm yourself, even if you're worried. Your dog can read your body language and knows your voice intonations very well. D. Let the dog get used to your voice, so he gets used to it as well. Once he learns that you're no threat, he will eventually calm down on his own.
The answer is:
C.