What does the image show about the extent and operation of the Inca Empire?

Question

The road system only traveled east to west across the Inca Empire, not north to south.
The Inca Empire extended across the Andes Mountains along the western side of South America.
The Inca Empire expanded in the Amazon River basin to the Atlantic Ocean.
The borders of modern countries, such as Colombia and Brazil, align with territory conquered by the Inca Empire.

Answer 1

The borders of modern countries, such as Colombia and Brazil, align with territory conquered by the Inca Empire.