In the Off-Highway Industry,there Are a Number of Machines That

In the off-highway industry,there are a number of machines that are built for highly specialized applications.These machines,such as underground drilling jumbos,harvesting and specialty agriculture equipment,and mining scalers,are built in low volume and require an equally low volume of specialized components.What would a customized manufacturer of drive-train products,use to reach its market?

A) market aggregation
B) limited demand
C) multisegment marketing
D) concentrated targeting