Answer: Foot-in-the-door
Step-by-step explanation:
A. Door-in-the-face is an approach under which the influencer first ask the respondent for a big request that he will probably decline then go to the small request that he actually wants to get fulfill.
B. The approach under which the influencer tries compliments and flattery on respondent to make him agree.
C. Adaptive selling is an approach in selling under which the salesman adapt his techniques as per the changing conditions.
D. Under need satisfaction the influencer first tries to understand the needs of the respondent and then prepare his pitch as per the observation.
E. Foot-in-the-door is an approach under which the influencer first make the respondent to agree to a small request following which he ask for the big one.
From the above we can conclude that Erin was using Foot-in-the-door.