Suppose a Certain Student,Nathan,falls Asleep During Every Chemistry Class

Suppose a certain student,Nathan,falls asleep during every chemistry class.Suppose further that Nathan is the only one who falls asleep in this class,and that he falls asleep in all of his other classes.According to Kelley's covariation theory of attribution,how will people explain his behavior (falling asleep) ?

A) It is due to something unusual about Nathan,because his behavior is low in consensus,high in distinctiveness,and high in consistency.
B) Social psychology is a really boring class because Nathan's behavior is high in consensus,high in distinctiveness,and high in consistency.
C) It is due to something peculiar about the circumstances on one day,because consistency is low.
D) It is due to something unusual about Nathan,because his behavior is low in consensus,low in distinctiveness,and high in consistency.