Given that all of the choices are true, which one would most effectively conclude this paragraph?
A. NO CHANGE
B. Smaller dogs generally have a higher-pitched bark, while a larger dog usually vocalizes with a much louder and deeper tone.
C. A yip or whimper indicates some type of pain or discomfort, while a deep bark probably shows more dominance and assertiveness and may be a signal of danger.
D. Part of obedience training is teaching a dog when it is appropriate to bark and when it isn’t.