aarkay87Hi,
This is in response to your query on answer choice A.
A recent study on Lyme Disease suggests that people who are bitten by ticks, especially by the lone star tick, develop a severe allergy to meat that scientists believe to be turning into an epidemic.
- The issue with this answer choice is not any idiomatic error in the usage of 'believed to be'. The error lies in the construction of the sentence itself.
- certain people develop a severe allergy to meat that scientists believe ________ turning into an epidemic.
- Let's understand the intended meaning of the sentence through structural analysis:
- As per a study, certain people develop
something that scientists believe
is turning into something much worse.
- people develop something that (scientists believe) _____ turning into something much worse.
-"scientists believe" is a
shortened sentence adverb clause equivalent to the adverb phrase "according to scientists"
- people develop something that, according to scientists, ______ turning into something much worse.
- now we can clearly see that this dependent clause is actually
missing a helping/aiding verb that goes with the main verb
turning.
- Hence, we get the answer C: ...people who are bitten by ticks develop a severe
allergy to meat
that scientists believe
is turning into an epidemic.
- '
that' is a relative pronoun which refers to '
allergy', because 'meat' cannot turn into an epidemic.
- Since 'that' refers to 'allergy', it requires a singular verb.
- Hence, '
is turning into'.
- Also, we
need the simple present tense to convey the universal findings of a study.
Hope this helps.
Best,
GMAT Whiz Team