The authors provide the text of a UPI story describing the discovery of the bones of a disabled dwarf in a cave in northern Italy. The reporters speculate that over 12,000 years ago, early hominids would take care of the disabled members of their group. ________ would argue that the bones belonged to a dwarf who was related to the other cave inhabitants, whereas ________ would argue that the other inhabitants relied on the dwarf for some unknown purpose.
a. Social exchange theorists; evolutionary theorists
b. Evolutionary theorists; social exchange theorists
c. Social psychologists; evolutionary theorists
d. Social exchange theorists; social psychologists