The correct answer is A. Brazil
Step-by-step explanation:
The Inca Empire was one of the most powerful empires that existed in America before Europeans discover this continent. This empire covered most Peru and part of Ecuador, Colombia, Chile, Bolivia and even part of Argentina. However, the empire did not get to the modern Brazilian territory in the east due to the territory conditions of this zone; also, the empire expansion occurred mainly to the North and South of the capital Cusco. Thus, the nation the Inca Empire failed to conquer was Brazil.