Which Group of Rhesus Monkeys Studied by Newman Et Al

Which group of rhesus monkeys studied by Newman et al.(2005) showed the highest levels of aggression,as measured by competition for food?

A) The monkeys with low-activity variation of the gene who were raised without maternal care.
B) The monkeys with low-activity variation of the gene who were raised by their mother.
C) The monkeys with high-activity variation of the gene who were raised without maternal care.
D) The monkeys with high-activity variation of the gene who were raised by their mother.

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