Some Beneficial Uses of Recombinant DNA Technology Include Production of Insulin

Some beneficial uses of recombinant DNA technology include production of insulin for diabetes patients and
I.hepatitis B vaccine.
II.erythropoietin,a protein used to stimulate red blood cell production (for instance in cancer patients treated with chemotherapy) .
III.tissue plasminogen activator for dissolving blood clots in cardiac patients.

A) I only
B) II only
C) III only
D) I,II,and III