What Was the Royal Patronage System

What was the Royal Patronage system?

A) The Spanish and Portuguese Crowns would be responsible to colonization and missions
B) It was a taxation system whereby the Spanish and Portuguese Crowns received ten percent of colonization profits
C) It was a taxation system whereby the Spanish and Portuguese Crowns received twenty-five percent of colonization profits
D) Colonies could only be set up after the explorers claimed the land for the Crown