Answer:
Letter c is correct. Primacy effect.
Explanation:
The primacy effect is a phenomenon that describes about the preference that humans have over a first choice, that is, individuals generally have a preference for the first data they receive about something, than the next data. This effect is compared to the first impression, which is the initial perceptions we get from meeting someone that are difficult to change even over time.
A good strategy for salespeople is to bring their highest performing product on the first visit, to have a positive effect on customer expectations and encourage sales.