What Does a Patent Do

What does a patent do?

A) It grants the creator of a book, film, or piece of music the exclusive right to use the creation for 20 years.
B) It grants the creator of a book, film, or piece of music the exclusive right to use the creation during the creator's lifetime.
C) It gives a firm the exclusive right to a new product for 20 years from the date the product is invented.
D) It gives the firm the exclusive right to a new product during the product inventor's lifetime.