[Scuba Diving] Felicia Invented a New Type of Mask That

[Scuba Diving] Felicia invented a new type of mask that was not subject to fogging for scuba divers and obtained a patent on it. She agrees to allow Mei to manufacture and sell the mask. She receives a sum of money for every mask that Mei sells. Felicia also entered into an agreement with Evan to allow him to sell the masks, but only if he also purchased non-patented diving suits from Felicia. All parties proceeded to do very well with their sales.
-Felicia's agreement with Mei allowing Mei to sell the mask is referred to as which of following?

A) A license
B) A patent agreement
C) A trade agreement
D) An illegal agreement
E) A franchise agreement