I tried to diagram this, but I do not understand how they derived at the correct answer. Can you please explain this to me?

Thanks! After I went back and slowly worked out the logic, I picked B as the correct answer. Although my reason for picking B over D was because the original argument used the contrapositive to arrive at the correct answer and so did B, but D didn't. For some reason, I read over and beyond reg royal...

I can eliminate A, D, and E as being incorrect. And although C doesn't necessarily strengthen the argument, I can't figure out how B strengthens it. Am I missing something between the lines? I'm just not understanding how non-moving cars and congestion have anything to do with making the argument st...

Is B somehow supposed to refute a claim that car-pooling will greatly reduce pollution, by showing that in cases of congestion this is less likely? That's all I could come up with.

I literally just stared at this question for almost 30 minutes trying to figure out why the answer is E and not A. I kept referring back to the entire passage and could not find evidence that clearly distinguished the 2. Then I went word by word for A and saw that the competing responsibilities they...