Sentence Correction (SC) | Re: Past assessments of the Brazilian rain forest have used

Correct idiom: either X or Y.
A and E: either logging...AS WELL AS surface fires
C: either logging...ALONG WITH surface fires
Eliminate A, C and E.

A conjunction such as but must serve to connect PARALLEL FORMS:
NOUN but NOUN
VERB but VERB
MODIFIER but MODIFIER.

D: surface fires, burning down invidivual trees but do not denude
Here, but incorrectly serves to connect burning (modifier) to do not denude (verb).
Eliminate D.

The correct answer is B.
B: either logging, which removes
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