In a common-law country, ownership of intellectual property rights is established by "prior use versus registration" which implies that to claim the ownership of a trademark, an individual:
A. must be ratified by the United Nations trademark protection agency.
B. must pay for the right to own a trademark.
C. must establish first use of a trademark.
D. must prove the ownership of a trademark in a court of law.
E. must register a trademark only in his home country.
Answer: C. must establish first use of a trademark.