单选题 According to the passage, the greatest part of the solar energy that reaches the Earth is ______.

A、 reflected back to space by snow and ice
B、 concentrated at visible wavelengths
C、 absorbed by carbon dioxide molecules
D、 absorbed by atmospheric water vapor

【正确答案】 B

【答案解析】从文中第一段allow radiation at visible wavelengths，where most oft he energy of sunlight is concentrated，to pass through)可以判断大部分太阳能量集中在visible wavelengths。