Jerry Hallett Made a Sales Call on the Owner of a Landscaping

Jerry Hallett made a sales call on the owner of a landscaping company to explain the advantages and features of the new Neelco Shrub Buddy for fertilizing plants in hard-to-get-to areas. Hallett is trained to answer any technical questions about the system and its use, to show the owner how the Shrub Buddy could be tailored to meet his specific needs, and to close the sale. Hallett acted as a(n) :

A) sales engineer.
B) outside order taker.
C) inside order taker.
D) missionary sales person.
E) detail sales person.