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Here is a detailed explanation to this question-
Raxit85
In the Middle ages, the distressingly high infant mortality rate, reckoned in the first year of life to have been around 300-350 per 1,000 live births when compared to a single-digit figure per 1,000 in rich countries now, resulted in the parents’ relative lack of interest in their children.
A) reckoned in the first year of life to have been around 300-350 per 1,000 live births when compared to a single-digit figure per 1,000 in rich countries now,
B) which is around 300-350 per 1,000 live births in the first year of life compared with a single-digit figure per 1,000 in rich countries now,
C) which was reckoned to have been around 300-350 per 1,000 live births in the first year of life compared with a single-digit figure per 1,000 in rich countries now, and
D) reckoned to have been around 300-350 per 1,000 live births in the first year of life compared with a single-digit figure per 1,000 in rich countries now,
E) reckoned to have been around 300-350 per 1,000 live births in the first year of life as compared with a single-digit figure per 1,000 in rich countries now, which
Choice A: This answer choice suffers from a meaning error due to improper construction; the phrase "when compared to a single-digit figure per 1,000 in rich countries now" incorrectly implies that the infant mortality rate of the Middle Ages was 300-350, per 1000 live births only when compared to the modern infant mortality rate in rich countries. These two statistics exist independently, and this sentence compares the two to highlight the severity of the former. Thus, this answer choice is incorrect.
Choice B: This answer choice incorrectly uses the present tense verb "is" to refer to an event in the far part. Thus, this answer choice is incorrect.
Choice C: This answer choice fails to maintain parallelism between the verbs "was reckoned" and "resulted". Moreover, this answer choice presents extra information between two commas; if this information is removed, the resulting sentence must be complete in itself. However, if the extra information in this answer choice is removed, the resulting sentence is "In the Middle ages, the distressingly high infant mortality rate
and resulted in the parents’ relative lack of interest in their children." Thus, the superfluous conjunction "and" renders this answer choice incorrect.
Choice D: This answer choice maintains parallelism and proper tense use, conveys the intended meaning of the sentence, and is properly constructed. Thus, this answer choice is correct.
Choice E: This answer choice also suffers from the error of superfluous conjunction, similar to the one seen in Option C, due to the inclusion of the word "which". Thus, this answer choice is incorrect.
Hence, D is the best answer choice.As this sentence is quite complex, it is important to understand its exact meaning. The core meaning of this sentence is that the high infant mortality rate in the Middle ages caused parents to take relatively little interest in their children. The information presented between the commas is additional information that highlights this core meaning by informing us just how high the mortality rate was, compared to the modern rate. Another thing to remember is that the subject of this sentence is "rate" and the action it takes is "resulted".
To understand the concept of "Extra Information Between Two Commas", you may want to watch the following video (~1 minute):
To understand the concept of "Compared With v/s Compared To", you may want to watch the following video (~1 minute):
All the best!
Experts' Global Team