In the Context of the Attribution Theory,which of the Following

In the context of the attribution theory,which of the following best illustrates a stable cause of behavior?

A) A company lays off 10 employees because of economic downturn.
B) A woman, who loves children, breaks up with her boyfriend because he does not want children of his own.
C) A college student is unhappy during the first semester because he is finding his classes difficult.
D) A family is rendered homeless after a tornado destroys their home.