Sentence Correction (SC) | Re: So called green taxes, which exact a price for the use of polluting or

So called green taxes, which exact a price for the use of polluting or nonrenewable fuels, are having a positive effect on the environment and natural resource base of countries as varied as China, the Netherlands, and Hungary.

(A) as varied as - short and crisp, we should go for this one
(B) as varied as are - as varied asare is wrong obviously
(C) as varied as those of - wordy and awkward construction eliminate straight away
(D) that are as varied as -that here refers to "countries"
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