Columnist: Much of North America and western Europe is more heavily forested and has less acid rain and better air q...

jing jing on April 21 at 03:37AM

I still don't get why D is not the answer.

I still don't get why D is not the answer. Also the previous post states that D actually weakens the conclusion. I still don't see how D weakens the conclusion. Thanks

1 Reply

Nishant on May 27 at 10:10PM

^ Yes, can someone help us out with this?