Granting a Pharmaceutical Company a Patent for a New Medicine

Granting a pharmaceutical company a patent for a new medicine will lead to (i)
A product that is priced higher than it would be without the exclusive rights.
(ii)
Incentives for pharmaceutical companies to invest in research and development.
(iii)
Higher quantities of output than without the patent.

A) (i) and (ii) only
B) (ii) and (iii) only
C) (i) and (iii) only
D) (i) , (ii) , and (iii)