Caterpillar Has Been Experimenting with Replacing the Traditional Steering Mechanism

Multiple Choice

Caterpillar has been experimenting with replacing the traditional steering mechanism on its graders with a joy-stick based steering mechanism.As a part of their research they built graders that included both a steering wheel and joy-stick steering mechanisms,then asked operators to use the machines for a few days.After two days of testing,several of the operators like the joysticks so well that they suggested that the steering wheel be removed to provide better visibility.This would be an example of _____ research.

A) primary
B) secondary
C) dichotomous
D) ethnographic
E) collaborative