America Airlines flight 77
Donald trump aka the worlds worst president/ attempted dictator
Tropical rainforest, the high mountains and wild rivers were some of the physical obstacles that the Incas faced. They had to build a complex network of roads to link the entire Inca empire. They had messenger stations along these roads so that they could relay their messages, and they built shelters along the way for travelers.
It would probably be the last one, agriculture because agriculture refers to actually growing crops while the other words dont directly relate to that.
Religious beliefs and practices, geography around Nile River and the creation of the Rosetta Stone, contributed significantly to the Egyptian security and stability. The only statement that did not contribute the the Egyptian's security and stability is the regular flooding of the Nile River.
The answer would be letter D.