The concept discussed in the passage is actually the ______.
A. traditional beliefs among people living in different areas
B. results of certain study on people living in different climate zones
C. belief that has no longer accepted by most of people
D. study done by Ellsworth Huntington alone
正确答案：C
49．答案为C根据最后一段最后一句Asforsummeritseemstobeagoodtimetotakealongvacationfromthinking作出该项选择
