Groups seeking donations often ask people to simply sign a petition first. This approach illustrates which of the following social influence techniques?

A) lowball technique
B) highball technique
C) foot-in-the-door technique
D) reciprocity norm

The foot-in-the-door technique involves first gaining a small commitment or agreement from someone before asking for a larger commitment, which is exactly what is happening when groups ask people to sign a petition before asking for a donation. This small commitment increases the likelihood that the person will later comply with the larger request.