Regarding the logic in answer choice (A):
‘Turkey’s economy has grown…….. , averaging an annual increase each year that is about eight percent …..’
The end-clause participial modifier, separated from the rest of the sentence by a (comma), is written with the intent to modify the fact that ‘Turkey’s economy has grown….’ quickly over the past 10 years.
However, from a logical standpoint, perhaps the modifier is a bit imprecise.
While it is true that the logical relationship between a “comma + VERBing” modifier and the preceding clause can not be broken down by looking at an independent clause version, doing so illustrates the potential issue.
*’Turkey’s economic growth has AVERAGED an annual increase of 8%.’
——-> it’s not that Turkey’s “economic growth” or Turkeys “economy” AVERAGED an increase: rather, Turkey’s economy INCREASED at an AVERAGE of 8%.
Perhaps if the participle “increasing” instead of “averaging” were used, the modifier would be a bit more clear.
Other potential errors:
(1) Redundancy: we can use “annual” or “each year” as a modifier of the average annual increase, but not both
(2) Compared with the official answer D, the phrase “an annual increase….that is about 8%” is less concise than the phrase “an average annual increase of about 8%”
(3) Potential Ambiguity regarding the relative pronoun “that”:
‘….., averaging an annual increase EACH YEAR that is about 8%……’
The logical referent noun of ‘that is about 8%’ is ‘annual increase’
However, ‘each year’ is an intervening, adverbial modifier that describes the participle ‘averaging.’
Question: HOW OFTEN does the averaging occur? Each year
In addition to the issue of redundancy, it seems problematic to have ‘each year’ intervene between the relative pronoun and its referent noun.
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