Why Was Chavin De Huantar's Location Pivotal in Its Success

Why was Chavin de Huantar's location pivotal in its success?

A) It was located at the intersection of trade routes between the mountain valleys and the coastal lowlands.
B) The rich farmland produced enormous agricultural surpluses.
C) The isolation from Andean societies prevented corrupting outside influences.
D) Its elevation was so high that it was difficult to invade.
E) Its location on the sea allowed for many positive outside influences and trade.