carcass wrote:
Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's).
(A) acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate
(B) acting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating
(C) act as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating
(D) they act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates
(E) they act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate
Try to solve ONLY from the meaning standing point. Thanks
Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's).
(A) acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate :
Correct : modifier “acting” correctly modifies the verb benefit
Construction of “Although ….., they also ….” Is correct
(B) acting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating
Incorrect : parallelism error “either from burning up or (from) freezing” – from is required before “freezing” to correct this error
Construction of “Although …., while …” is awkward and incorrect
(C) act as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating
Incorrect : Construction of “Although …., while …” is awkward and incorrect
Verb “act” is now associated with ice particles and is highlighting another action of the ice particles rather than providing information about how they benefit earth.
(D) they act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates
Incorrect : Construction “although ….even though” redundant…
Pronoun error : “it also accelerates” – is singular ..we are talking about ice particles (plural)
(E) they act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate
Incorrect : “they act …to thus keep earth ….” Change in meaning
They act that way and thus it helps earth…they do NOT in particular act that way IN ORDER to help earth…
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