Ayres Corporation Ayres Corporation Makes Airplanes

Ayres Corporation Ayres Corporation makes airplanes.It sells about 50 planes a year to be used as crop dusters.It sells another 75 a year to delivery companies.In addition,it manufactures another dozen or so that are used for fire fighting,and it sells about six a year for military transport purposes.
-Refer to Ayres Corporation.Which variables does Ayres Corporation use?

A) demographic
B) company characteristics
C) benefit
D) buyer ethnicity