Official Solution:For the past 50 years, due to changes in lifestyle and recreational activities, the population of the United States has become increasingly kyphotic, displaying poor posture and spine curvature, and it will probably have what is estimated as 100 million people with back problems next year, more than any other nation in the world will.A. it will probably have what is estimated as
B. they are likely to have
C. the country will probably have
D. there will probably be
E. there will be an estimated
This sentence contains an illogical antecedent and is unidiomatic and redundant.
(1) The subject of the sentence is
the population. (
of the United States is a prepositional phrase describing
the population.) The pronoun
it refers to the subject
population. However, it is illogical to say that
the population ...will have people; logically,
the United States...
will have people.
(2)
Estimated as is unidiomatic;
estimated to be is the preferred idiom on the GMAT. Additionally,
will probably have and
what is estimated as are redundant.
Choice
C clarifies that
the country will probably have 100 million people with back problems, eliminating the pronoun error.
Choice B:
they cannot logically refer in number to the singular
United States or
population.
Choices D and E are ambiguous. The first clause describes what would cause people specifically in the United States to have back problems. In choices D and E, it is not clear that these causes will actually have an effect on people
in the United States. "There will probably be" and "there will be an estimated" make no reference to
where these speculations will have an effect and thus fail to connect the second independent clause to the first in the most logical manner. Choice C clearly states that these causes will have an effect in "the country," referring to the same country mentioned in the previous clause and thus connecting the second independent clause to the first.
Answer: C