Professor Fiekema claims that people are motivated to form social attachments because those who did were more likely to reproduce and co-nurture their offspring to maturity.The professor's suggestion best illustrates

A) social networking.
B) narcissism.
C) that the need to affiliate has survival value.
D) achievement motivation.

The professor's suggestion that people are motivated to form social attachments because it has survival value aligns with the concept that humans and other animals have a basic need for social connection and belongingness, known as the need to affiliate. This need has been shaped over time through evolutionary processes as it was beneficial for individuals who formed social attachments to have better reproductive success by co-nurturing offspring, and thus passing on their genes. This explanation does not directly relate to options A, B, or D.