When a Respiratory Therapist Saw an Article About Zyran,an Over-The-Counter

When a respiratory therapist saw an article about Zyran,an over-the-counter smoking cessation drug that does not contain nicotine,he called the toll-free number provided by the manufacturer to learn more about the drug and to ask that a salesperson call on him.This is an example of _____.

A) inbound telemarketing
B) bounce-back telemarketing
C) outbound telemarketing
D) seminar marketing
E) convention marketing