Despite the success of the bone marrow transplant, the patient was advised to take immuno-suppressive drugs, drugs that will inhibit the activity of the immune system, because she developed a rare case of graft-versus-host disease post the transplant.Proper sequence of events: transplant > rare case developed > advisedA. Despite the success of the bone marrow transplant, the patient was advised to take immuno-suppressive drugs, drugs that
will inhibit the activity of the immune system, because she
developed a rare case of graft-versus-host disease post the transplant.
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use of "will" changes the tense; "developed" shall be replaced by "had developed" to convey proper sequence.B. Even though the bone marrow transplant
was successful, the patient was advised to take immuno-suppressive drugs, drugs that inhibit the activity of the immune system, because she had developed a rare case of graft-versus-host disease post the transplant.
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transplant and developed are in same time frame as per this optionC. Even though the bone marrow transplant had been successful, the patient was advised to take immuno-suppressive drugs, drugs that inhibit the activity of the immune system, as she had developed a rare case of graft-versus-host disease
post the transplant.
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Correct. This conveys the proper sequence (notice that "post the transplant" is essential to convey the proper sequence)D. Despite the success of the bone marrow transplant, the patient was advised to take immuno-suppressive drugs,
drugs inhibit the activity of the immune system, as she
has developed a rare case of graft-versus-host disease post the transplant.
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THAT is missing between drugs and inhibit, thus changing the meaning; HAS is also incorrect as it changes the tense.E. Even though the patient’s bone marrow transplant had been successful,
she was advised to take immuno-suppressive drugs, drugs that can inhibit the activity of the immune system, as she had developed a rare case of graft-versus-host disease post the transplant.
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Notice that SHE has no antecedent! as "she" cannot refer to a possessive noun "patient's bone marrow transplant".