[单项选择]Man, so the truism goes, lives increasingly in a man-made environment. This places a special burden on human immaturity, for it is plain that adapting to such variable conditions must depend very heavily on opportunities for learning, or whatever the processes are that are operative during immaturity. It must also mean that during immaturity man must master knowledge and skills that are either stored in the gene pool or learned by direct encounter, but which are contained in the culture pool--knowledge about values and history, skills as varied as an obligatory natural language or an optional mathematical one, as mute as levers or as articulate as myth telling.
Yet, it would be a mistake to leap to the conclusion that because human immaturity makes possible high flexibility, therefore anything is possible for the species. Human traits were selected for their survival value over a four--to five-million-year period with a great acceleration of the selection process during the last h
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