Ellsworth Huntington’s conclusion was based on _____.

A. variations of his own mental abilities from season to season
B. the result of research done by him and other scientists among peoples in different climates
C. detailed records of temperature changes in different places
D. detailed records of different ways of thinking among peoples in different climates
A. variations of his own mental abilities from season to season
B. the result of research done by him and other scientists among peoples in different climates
C. detailed records of temperature changes in different places
D. detailed records of different ways of thinking among peoples in different climates

【答案】