amitraj

D it is

i picked C :)

D is clear enough. Also the usage of tenses is correct in D. It seems out of wack at other places

I will pick D too

why would u say that D is better than B? i kinda still think that B is better

it should be C....difficult to guess so many things as the question was not underlined and option A was also not specified

C it is for me too

C seems to be the best choice

D is clear

i vote for B My problem with D... there-> refers to population..first of all it seems to be an antecedent problem and I think it shud not be plural in this case

i think its B too. parallel "to live"..."to maintain" in to be considered too

ketan, good point abt 11

11. C 10. E -- needs to start with "have ...", between D and E. E fits in

seems to be D

That is good to hear :)