O-MY-U Once Had a Winning Team in Every College Sport

O-MY-U once had a winning team in every college sport.But athletes graduate and fortunes change.Attendance at the games dropped when the team had a losing season.Bob and Shirley found it difficult to attract enough guests to their bed-and-breakfast to cover their costs.How would Michael Porter explain this?

A) The focus strategy was imitated.
B) Demand disappeared.
C) The target segment lost its uniqueness.
D) New firms subsegmented the industry.