Which of the Following Are Defenses to Patent-Infringement Claims

Multiple Choice

Which of the following are defenses to patent-infringement claims?

A) noninfringement, invalidity of the patent, misuse of the patent, and innocent infringement
B) noninfringement, invalidity of the patent, fair use, and innocent infringement
C) noninfringement, fair use, misuse of the patent, and innocent infringement
D) Fair use, misuse of the patent, innocent infringement, and illegality of the patent