BRAINLIESET! 5 STARS & A THANKS!! PLS HELP 1. For centuries, the Inca civilization was well hidden from Spanish invaders and explorers. What protected this unique culture from outside influences?
A. Inca settlements were usually protected by armed guards who kept intruders out.
B. Inca settlements were usually hidden by dense fog and located in swamps that were hard to navigate.
C. Most Inca settlements were hidden by the thickly growing vegetation of South American rain forests.
D. Inca settlements were difficult to find and reach because they were build at high altitudes on rough terrain.

2. The decline or weakening of Mesoamerican civilizations can be attributed to two "natural" causes in addition to deliberate attacks by Spanish invaders. What were these two causes?
A. lack of agricultural skill and loss of fertile farmland
B. floods and an earthquake
C. overpopulation and lack of domesticated animals
D. infectious diseases and drought