Owning a patent:Question $3$ Select one:a$.$Indicates that the value of a company exceeds the fair market value of a company's net assets if purchased separately.b$.$Gives the owner exclusive rights to manufacture and sell a patented item or to use a process for $20$ years.c$.$Gives the owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus $70$ years.d$.$Gives its owner the exclusive right to publish and sell a musical or literary work during the life of the creator plus $17$ years.