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Recall that the introduction to Chapter 11 (Prosocial Behavior) began with a description of several of the citizen-heroes of September 11, 2001—for example William Wik, who refused to flee to personal safety because there were still people to be rescued. He died when a tower collapsed. Wik was willing to sacrifice his own life to save others, and his behavior could thus best be described as __________.a. altruisticb. communalc. evolutionarily adaptived. an example of kin selection

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