An ad for The Peabody Hotel in Memphis, Tennessee, has a number that people can call on if they are interested in reserving rooms at the hotel or knowing more about the hotel. One way to determine the effectiveness of this ad is to count the number of phone calls it receives in response to its ad. This response count is an example of:
A. feedback.
B. encoding.
C. noise filtering.
D. noise blocking.
E. decoding.
Answer: A