Consider an ultimatum game where the Proposer offers a proportion of $100 to the Responder, who can either accept or reject the offer. If the Responder accepts, both the Proposer and the Responder keep the agreed share, while if the Responder rejects, then both receive nothing. The figure below shows the results of a study that compares the responses of US university students and Kenyan farmers.

Based on the information from the figure, we can infer that:

Select one:

a.

Social norms matter more than self-interest when people make decisions.

b.

Over 90% of Kenyan farmers rejected the offer of the Proposer keeping 40%.

c.

Kenyan farmers are more likely to reject low offers than the students from Emory University.

d.

Both groups of Responders are indifferent between accepting and rejecting an offer of receiving nothing.