It would be <span>B.early agricultural innovations attracted researchers to the area and led to new achievements in biology and genetics. The innovations and breakthrough in early innovations in agriculture magnets a lot of researchers to further develop the progress and thus becoming the leader of field of agriculture and develops further than anyone else.</span>
A common factor that triggered the hot wars in Asia was based on communism. The United States wanted to halt the spread of communism while the Soviet Union wanted to influence every region and make them communists.
The five pillars of Islam are, Shahadatain when you make your promise to become Muslim, Salat when you pray, Zakat when you give charity, hajj the pilgrimage to mecca, and fasting of Ramadan when you don't eat till sun down.
They all believe in one God, their holy book derives from the Torah somewhat, they generally have the same ethics (don’t kill, don’t steal etc.)
However, Jews are still waiting for a messiah, Christians are waiting for the Messiah Jesus to come again, and Muslims are a bit of a mix, Messianism is alien to Sunni Islam but it is a central belief in Shia Islam.
Human sacrifice and expansion was the answer because the Aztecs were a feared tribe and conquered many people. They had always practiced human sacrifice and that was one of the reasons that Hernan Cortes had been horrified about. It couldn't have been anything about conquering Mayans because their civilization had died out for some strange reason.