I could not get how E is the answer.
I eliminated A,B and C because we need to derive the conclusion from I and IV. So, D and E remain in the arena. D is ruled out because if rainwater is already polluted, then the conclusion that 'my car is polluting' is tough to reach.
E is non-committal in any sense. How is E the answer through venn diagram? The only way I see that to be an answer is that it has eliminated one cause that may oppose the deduction. Is it the reason why E is the answer?
Could you clarify me?
OA is A and E.
I hope these don't appear in the original GMAT. These sound more like GRE format. I too had to draw venn.
Thnx & Rgds,