When Dr James Greene Staff Began Complaining About How Slow His

When Dr. James Greene staff began complaining about how slow his autoclave is when they use it to sterilize dental equipment, he made a couple of phone calls, gathered information on possible autoclaves and then ordered the new Vela autoclave because it is the fastest and safest on the market. Dr. Greene has engaged in:

A) the buying-decision process.
B) a market development strategy.
C) a new-task purchase.
D) reciprocal buying.
E) systems buying.