Yuengling,founded in 1827,is the Oldest Brewery in the United States

Yuengling,founded in 1827,is the oldest brewery in the United States.It has survived by severely limiting sales of the beer and creating a mystique about the brand.In areas where the beer is sold,its brand name is used to identify all beer,the same as Kleenex is used by many to represent all types of tissues.Its competitors all wanted to expand their markets.Yuengling's strategy was "To do nothing." For over 180 years,what has this strategy given the brewery?

A) a brand name strategy
B) a niche competitive advantage
C) a price differentiation advantage
D) a sustainable competitive strategy