Of the Following,who Is Demonstrating Mania

Of the following,who is demonstrating mania?

A) Imogen,who screams at her girlfriend for talking too much with another woman
B) Courtney,who is euphoric over her approaching wedding day
C) Dakota,who feels so cheerful that he talks extensively and rapidly with strangers on the subway and on the street
D) Andie,who becomes aggressive after drinking several margaritas