다음 글의 빈칸에 들어갈 말로 가장 적절한 것은?Most of the … | [법원직 9급 영어] 16년 1회차 기출문제 상세 페이지

다음 글의 빈칸에 들어갈 말로 가장 적절한 것은?
Most of the world's great cities have grown randomly, little by little, in response to the needs of the moment; very rarely is a city planned for the remote future. The evolution of a city is like the evolution of the brain: it develops from a small center and slowly grows and changes, leaving many old parts still functioning. There is no way for evolution to remove _____________________________ and replace it with something of more modern manufacture. The brain must function during the renovation. That is why our brain stem is surrounded by the R-complex, then the limbic system and finally the cerebral cortex. The old parts are in charge of too many fundamental functions for them to be replaced altogether. So they wheeze along, out-of-date and sometimes counterproductive, but a necessary consequence of our evolution.
*R-complex: (두뇌의) R영역
**limbic system: (두뇌의) 변연계
***cerebral cortex: 대뇌피질

the arrangement of new city streets

the invasion of an alien substance

the advantage of natural selection

the ancient interior of the brain