A Client Says to the Nurse,I Just Don't Understand Why

A client says to the nurse,I just don't understand why my prescription costs so much.I tried to get a generic one,but the doctor said there isn't one yet." Which rationales are most appropriate for the nurse to use when responding to this client's question?
Select all that apply.

A) During the time of exclusivity,there is little competition,resulting in higher prices.
B) During the time of exclusivity,there are generic versions of the drug,but the pharmacist has the right to sell only the brand-name drug.
C) Once the time of exclusivity is over,other drug companies will be able to market generic drugs for less than the brand-name drug.
D) When the generic equivalent is released,the physician may routinely substitute the brand-name version for the generic version.
E) The period of exclusivity does not apply to Internet pharmacies based in other countries.