Which Is the Best Example of an Emotional Syndrome

Which is the best example of an emotional syndrome?

A) Brain activity increases when a woman looks at a photo of her husband.
B) After suffering damage to the right side of his brain, a man becomes inordinately cheerful.
C) Blood flow to the amygdala increases when a woman watches a scary movie.
D) A man reports being happier at age 60 than he was at age 40.