When the team he supports wins the World Cup, Robert feels a surge of joy, which turns into a feeling of satisfaction that lasts for days. What is one of the reasons that the feeling of satisfaction might be categorized as a mood and not an emotion?
A.
It is a very strong feeling.
B.
It is brought about by a specific event.
C.
It has a lengthy duration.
D.
It is a positive feeling.
E.
It is expressed on his face.