When we have been rejected by others, we feel "social pain." Asked to explain social pain, Nancy notes that when certain areas of the limbic system (the anterior cingulate cortex and the anterior insula) are activated the individual feels this bad emotion. Asked the same question, Carlos notes that things that cause us pain are generally things that are not good for us, and that natural selection has shaped our nervous system to make us feel bad when we engage in behavior that threatens our survival and reproductive potential. Humans are very dependent on other humans to survive and reproduce, and have been so throughout our evolutionary history. Genes that caused our ancestors to feel bad when they did something to offend the group were naturally selected because those with such genes learned (through punishment) not to engage in the sorts of social behaviors that can get one ostracized. The ostracized human is unlike to survive and reproduce. Nancy's explanation is ________, while Carlos' is ________.
proximate, ultimate
physiological, proximate
ultimate, proximate
proximate, physiological