TransWave International Is a Company That Markets Patented Electronic Sensors

TransWave International is a company that markets patented electronic sensors as an early warning device for locating potential problems with buried pipelines. TransWave sends an environmental expert, a safety engineer, a legal representative to explain new regulations enacted by the U.S. Office of Pipeline Safety, and an experienced pipeline expert when it meets with a prospect. This is an example of how TransWave uses

A) partnership selling.
B) order getting.
C) functional selling.
D) sales engineering.
E) team selling.