Answer: The correct answer is: This is most likely because participants <u>relied on causal theories about the relation between mood and sleep</u>.
Explanation:
There are different theories that affirm that sleep deprivation may affect people's mood. Those theories asserts that if a person doesn't get enough sleep, their performance the next day will not be the best, making the individual to feel anxious, frustrated or angry. The participants could take into account those theories when answering what were the probable causes of their mood.
