Bertha Is Willing to Issue a License for Her Patented

Multiple Choice

Bertha is willing to issue a license for her patented copy machine, but only if the licensee agrees to buy all of the required copy paper from her office supply store during the term of the license. Which of the following statements is true about Bertha's plan?

A) This arrangement must be registered in court.
B) This arrangement constitutes an unlawful tying arrangement.
C) This arrangement constitutes unlawful cross-licensing.
D) This arrangement is legal and valid.