.w. . e What was the primary cause of the fall of the Zhou dynasty? O Nomadic tribes formed alliances with feudal leaders. OLeaders of the feudal states attacked the capital city Leaders of the feudal states declared independence NOItaiuIC UIDesuieu wuuNe Kimg agalnseduareaues.

i think it B but if I am wrong plz correct me  

Explanation:

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to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

they died because of a disease during the first spanish colonies.