GMAT Critical Reasoning (CR) | Re: QOTD: An anthropologist studying the social function

This is a close call between B and D. I fell for D , but upon closer examination realized that it must be B. My take :

Premise - "An anthropologist studying the social function of human skin has stated that tattoos are an ancient form of body art. Tattoos, she argues, function as a mode of self-identification: the placement and design of tattooed images communicate ideas of central importance to those who bear them." In other words tattoos are an ancient phenomenon and they were used
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