Cessna Is Considered the Volume Leader in the Executive-Jet Market

Cessna is considered the volume leader in the executive-jet market.It has been described as "almost totally vertically integrated." This quote means that Cessna

A) does not fall under the jurisdiction of any federal regulatory agency.
B) has eliminated economies of scale.
C) combines successive stages of production and distribution under a single ownership.
D) has achieved a high level of social responsibility.
E) uses outsourcing for all component parts and materials.