Human beings have evolved as social animals that live in groups. As a consequence, we have also evolved mechanisms to:

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Humans have evolved to be highly social creatures, living in groups for protection, cooperation, and reproduction. To ensure the survival of the group, individuals have developed mechanisms to detect danger from within the group, such as identifying potentially harmful individuals or conflicts. Additionally, humans have developed the ability to distinguish members of their own group from outsiders, which helps to maintain group cohesion and identity. Therefore, the best choice is D as it covers both options, detecting danger from within one's own group and distinguishing members of one's own group. While humans can integrate into other groups, this is not a universally evolved mechanism, and is not as essential to the survival of the group as the abilities to detect danger and distinguish members.

Human Beings Have Evolved as Social Animals That Live in Groups