Owning a Patent

Owning a patent:

A) Gives the owner exclusive rights to manufacture and sell a patented item or to use a process for 20 years.
B) Gives the owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus 70 years.
C) Gives its owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus 17 years.
D) Gives its owner an exclusive right to manufacture and sell a device or to use a process for 50 years.
E) Indicates that the value of a company exceeds the fair market value of a company's net assets if purchased separately.