"My Niche Is Designing Smartphone Apps for Senior Citizens, a Growing

"My niche is designing smartphone apps for senior citizens, a growing market due to the aging of the Baby Boomer generation," said entrepreneur programmer Rich Webb. "Examples include apps for helping a shopper find his car in a parking lot, for keeping track of medications, and for monitoring blood pressure." Rich is developing entrepreneurial opportunities based upon events and trends as they unfold-in this case, due to

A) lifestyle and taste changes.
B) demographic changes.
C) economic dislocations.
D) calamities.
E) government initiatives and rule changes.