单项选择题

The car’s effect upon the environment has been evident,while its contribution to human happiness has been insignificant.()

A.汽车对于促进人类幸福的同时,也对环保有较明显的影响。
B.汽车对于环保的影响显而易见,对人类幸福的贡献却少之又少。
C.汽车对于环境的影响显而易见,对人类幸福的贡献却微不足道。
D.汽车对于环境的影响显而易见,对人类幸福也有重大贡献。