Some patients who do not respond therapies of depression may simply have received inadequate treatment, having, for example been prescribed a drug as a dosage too low to be effective or having been taken off a drug too soon.
A having, for example been prescribed a drug as a dosage too low to be effective or having been
B having, for example, a drug prescription that was ineffective because the dosage was too low, or being
C as, for example, having too low of a dosage of prescribed drug for it to be effective, or being
D when they have, for example, been prescribed too low a drug dosage for it to be effective, or were
E for example, when they have a drug prescription with a dosage too low to be effective, or been
I have read somewhere that having been is generally wrong on gmat ... however, the OA is A
Please explain your answers.
A having, for example been prescribed a drug as a dosage too low to be effective or having been
B having, for example, a drug prescription that was ineffective because the dosage was too low, or being
C as, for example, having too low of a dosage of prescribed drug for it to be effective, or being
D when they have, for example, been prescribed too low a drug dosage for it to be effective, or were
E for example, when they have a drug prescription with a dosage too low to be effective, or been
I have read somewhere that having been is generally wrong on gmat ... however, the OA is A
Please explain your answers.

















