Official Solution:
In an acclaimed medical newspaper, scientists investigating the long-term effects of stroke have reported that injury to a specific part of the brain, locating it behind the ear, can instantly and permanently break a smoking habit.
A. scientists investigating the long-term effects of stroke have reported that injury to a specific part of the brain, locating it behind the ear,
B. scientists investigated the long-term effects of stroke and reported that injury to a specific part of the brain, located behind the ear,
C. scientists, who investigated the long-term effects of stroke, had reported that injury to a specific part of the brain located behind the ear
D. scientists investigating the long-term effects of stroke have reported that injury to a specific part of the brain can be located behind the ear and
E. scientists investigating the long-term effects of stroke reported that injury to a specific part of the brain, located behind the ear,
A. The present participle modifier “locating it behind the ear” seems to indicate that it is the injury that locates something behind the ear. The implied meaning is that injury can break a habit, (by) “locating it behind the ear“. Such an implication does not make sense.
The pronoun “it” is ambiguous.
B. Meaning of the original sentence is distorted. This sentence implies that the scientists did two things in the newspaper, “investigated” and “reported”. This meaning is wrong because the investigation was not done in the journal, only the reporting was. The investigation could have taken place in a physical location, such as a hospital or a clinic, but it does not make sense to say that the investigation took place in the newspaper.
C. Use of past participle tense “had reported” and simple past tense “investigated” wrongly imply that the action reporting occurred before the action investigating.
D. The use of the simple present sentence “can be located” wrongly implies that
in general an injury can be located behind the air. So is not the intended meaning.
E. CORRECT. The modifier “located behind the ear” correctly modifies “specific part of the brain”. The present participle modifier “ investigating..” correctly modifies “scientists”, taking up the same tense as the main verb “reported”.
Answer: E