Which of the following is a set of exclusive rights granted by a state to an inventor or his assignee for a fixed period of time in exchange for the disclosure of an invention?

Which of the following is a set of exclusive rights granted by a state to an inventor or his assignee
for a fixed period of time in exchange for the disclosure of an invention?

A.
Patent

B.
Utility model

C.
Snooping

D.
Copyright