Which Factor Contributed to the Bankruptcy of the Schwinn Bicycle

Which factor contributed to the bankruptcy of the Schwinn bicycle company?

A) Schwinn was unable to successfully promote their brand or appeal to consumers in the United States.
B) Schwinn was not innovative and did not add new features to their bicycles over time.
C) Tariffs were rising on imported bicycles.
D) Foreign competitors were able to manufacture competitive bicycles at a lower cost.