The government can block the entry to a market through
A. granting a public franchise.
B. granting a copyright.
C. granting a patent.
D. All of the above.
Which of the following rights is given to the holder of a patent?
A. a public franchise
B. control over a key resource used in production of a good or service
C. the exclusive right to a new product for a limited period
D. the right to earn profits from creation of the product indefinitely
