Fleur Is a Company That Manufactures Perfumes

Fleur is a company that manufactures perfumes. Fleur hires a creative agency to make an advertisement. Before releasing the ad, Fleur shows it to a select audience to test the clarity of the message in the ad, the relevance of the communication channel, and the ad's power of persuasion. While the ad is running, Fleur monitors the daily sales of the perfume and, after the ad has run its course, the company measures the changes in customer perception, awareness, and any resultant purchasing action.
-As the ad is running, Fleur monitors the daily sales of the perfume.This is an example of:

A) tracking.
B) impressions.
C) pretesting.
D) pulsing.
E) post-testing.