A-A+
Why do cars cause less pollution than before？B
问题详情
Why do cars cause less pollution than before？Because ______.
A．environmental engineers designed an object for cars removing harmful pollution
B．the cars are very small
C．the cars don"t use gasoline any longer请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：现在，汽车排出的废气更少了，这归功于环境工程师们的辛勤劳动。B和C没有提到。
