Who,of the Following,falls Within the Group Most Likely to Have

Who,of the following,falls within the group most likely to have the lowest rate of bipolar disorder?

A) Adrien,from Germany,who eats lots of boiled vegetables such as cabbage
B) Daniel,from Korea,whose family has always eaten a lot of fish
C) Jeff,a Canadian,who has been taking omega-3 supplements for over 2 years
D) Roberto,from Italy,who enjoys tomatoes in any form