RainCo, a Domestic Corporation, Owns a Number of Patents Related

Multiple Choice

RainCo, a domestic corporation, owns a number of patents related to designing umbrellas.RainCo licenses these patents to unrelated parties.TexCo, a domestic corporation, paid RainCo $100,000 in royalties related to these licenses.TexCo uses the patent information in its manufacturing process in its Canadian plant.IrishCo, an Irish corporation, paid RainCo $25,000 in royalties related to the licenses.IrishCo uses the patent information in its manufacturing process in its Michigan manufacturing plant.How much U.S.-source royalty income did RainCo earn from these licenses?

A) $0.
B) $25,000.
C) $100,000.
D) $125,000.