The Burr-Hamilton duel took place in ______.

A．were useful to earlier human beings but have since lost their utility
B．appeared in response to the need to learn a natural language and the use of tools
C．humans currently exhibit but that developed in response to conditions of an earlier age
D．are disadvantageous to creatures whose way of life is primarily technical and social

A．Medical students in a course on human anatomy.
B．College students in an introductory course on archaeology.
C．Psychologists investigating the uses of human immaturity.
D．Biologists trying to trace the course of human evolution.