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Difficulty—
The study involved 1000 patients whose cardiac disease was not well controlled by existing medications—drugs such as ACE inhibitors and beta-blockers—and had suffered persistent symptoms that had been lasting for at least a year.
(A) and had suffered persistent symptoms that had been lasting for at least a year
(B) and suffered from persistent symptoms that had lasted for at least a year
(C) but were suffering from persistent symptoms that had been lasting for a year or more
(D) and who suffered persistent symptoms that had been lasting for at least a year
(E) but had suffered from persistent symptoms that lasted for a year or more
OA D
Source: Veritas Prep
(A) and had suffered persistent symptoms that had been lasting for at least a year
(B) and suffered from persistent symptoms that had lasted for at least a year
(C) but were suffering from persistent symptoms that had been lasting for a year or more
(D) and who suffered persistent symptoms that had been lasting for at least a year
(E) but had suffered from persistent symptoms that lasted for a year or more
OA D
Source: Veritas Prep
