When a Pharmaceutical Company Discovers a New Drug, Patent Law

When a pharmaceutical company discovers a new drug, patent law gives it market power by guaranteeing:

A) partial ownership of the right to sell the drug for an unlimited number of years.
B) partial ownership of the right to sell the drug for a limited number of years.
C) sole ownership of the right to sell the drug for a limited number of years.
D) sole ownership of the right to sell the drug for an unlimited number of years.