Multiple Choice
Which of the following statements regarding yawning is LEAST accurate?
A) Yawning is seen in all cultures.
B) Yawning is a response to a buildup of carbon dioxide.
C) Yawning is correlated with sleepiness and boredom.
D) Yawning is seen in other mammals, as well as in birds, fish, and reptiles.
Correct Answer:

Verified
Correct Answer:
Verified
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