In social psychology, the foot-in-the-door phenomenon refers to the tendency to:

• A. Comply with a small request only if a large request is refused first
• B. Change one's attitude to match one's behavior after making a decision
• C. Agree to a large request after first agreeing to a small request
• D. Refuse all requests after being asked for something unreasonable

Answer: (C)

Verified step by step guidance

1. Understand the concept of the foot-in-the-door phenomenon in social psychology, which involves compliance behavior.
2. Recognize that this phenomenon describes a situation where agreeing to a small initial request increases the likelihood of agreeing to a larger subsequent request.
3. Identify that the key idea is sequential compliance: first a small request is accepted, which then leads to acceptance of a larger request.
4. Compare the options given and note that the correct description matches the idea of agreeing to a large request after first agreeing to a small request.
5. Conclude that the foot-in-the-door phenomenon is about increasing compliance through gradual escalation of requests, not about refusing requests or attitude change after decisions.