Answer:D)door-in-the-face requests
Explanation:
In contrast to the foot-in-the-door which will introduce a small request first with an aim that if someone has agreed to a small request they are likely not to refuse when you make a bigger request.
A door-in-the-face requests is based on starting with a highly demanding request that you know very well it would be refused then introducing the actual request when the highly demanding request is refused.
The first request of persuading people to place a big unattractive flag in their lawns is unreasonable and people are likely to refuse , then the actual request is made which is to request them to place a small sign in their lawns and when relating this to the first unreasonable request it will make sense to agree to the small flag request.