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by aditya8062 » Wed Oct 08, 2014 10:02 pm
Scientists have determined that the inner ear assists in awareness of body orientation,
since people with disorders of the inner ear were found to have increased
difficulties in maintaining balance.
(A) were found to have increased difficulties
(B) have been found to have increased difficulty
(C) were found to have increasing difficulty
(D) had been found to have increased difficulties
(E) have been found to have increasing difficulties

my doubt: i am not able to understand as how B can be correct here? choice B is using "present perfect" with "present perfect infinitive"
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by GMATGuruNY » Sun Oct 12, 2014 2:38 am
aditya8062 wrote: my doubt: i am not able to understand as how B can be correct here? choice B is using "present perfect" with "present perfect infinitive"
B does not employ the perfect infinitive.
In B, increased serves not as a verb but as an ADJECTIVE describing difficulty.
If we omit this adjective, we get:
People have been found TO HAVE difficulty in maintaining balance.
Here, to have is the PRESENT INFINITIVE form of to have.
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