Yurik79 wrote:
Data gathered by weather satellites has been analyzed by scientists, reporting that the Earth's northern latitudes have become about ten percent greener since 1980, due to more vigorous plant growth associated with warmer temperatures and higher levels of atmospheric carbon dioxide.
(A) Data gathered by weather satellites has been analyzed by scientists, reporting that the Earth's northern latitudes have
(B) Data gathered by weather satellites has been analyzed by scientists, and they report the Earth's northern latitudes as having
(C) After analyzing data gathered by weather satellites, scientists report that the Earth's northern latitudes have
(D) After analysis of data, gathered by weather satellites, scientists report the Earth's northern latitudes as having
(E) After data gathered by weather satellites was analyzed by scientists, who report that the Earth's northern latitudes have
This question is based on Modifiers, Tense, and Verb forms.
Option A has the error of Dangling Modifier as the modifier “reporting that the Earth's northern latitudes have….” doesn’t modify the clause “Data gathered by weather satellites has been analyzed by scientists”. A participle phrase can modify either a noun or the subject in the clause before it. The subject is ‘data’ but in this case, data cannot
report anything. So,
Option A can be eliminated.
Option B ends in the perfect participle “having become”. The present perfect or the present perfect continuous tense is used with the preposition ‘since’. So, the form ‘have become’ is the more appropriate form and therefore,
Option B can also be eliminated.
Options C, D, and E have a different structure.
Option D contains commas that are unnecessary - After analysis of data, gathered by weather satellites, - The placement of commas unnecessarily separates the phrase “gathered by weather satellites” from the noun ‘data’. Option D also contains the perfect participle, thereby repeating the error in Option B. So,
Option D can also be eliminated.
Option E is an incomplete sentence; the structure of E is:
After data gathered by weather satellites was analyzed by scientists – Dependent adverbial clause
who report that the Earth's northern latitudes have become about ten percent greener since 1980, due to more vigorous plant growth associated with warmer temperatures and higher levels of atmospheric carbon dioxide – Dependent adjective clause
So, effectively,
Option E is made up of two dependent clauses. There is no independent clause to complete the meaning.
Option C correctly uses the adverbial phrase (After analyzing data gathered by weather satellites) to modify the subject and verb (scientists report) to show that the scientists report something after analyzing data.
The option also contains the present perfect tense to suit the preposition ‘since’.
"
have become about ten percent greener
since 1980"
Therefore, C is the most appropriate option.Jayanthi Kumar.