The American and French revolutions
The correct ones are the last 3:
<span>c. The Aztecs welcomed the Spanish with gifts.
d. The Spanish took Moctezuma prisoner.
e. Smallpox weakened the Aztec's ability to resist.
.
The Aztecs sent Gold to the Spanish, but this only incited them to conquer them even more. Then the Spanish fought against the Aztec (but they did mange to recruit the Tlaxcaltecas) and they imprisoned Moctezuma.
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Of all the four choices, the one that they both failed is <span>(B)Ridding Russia of serfdom.
They both gave several social and political reforms, but they were criticized by historians for not providing laws to help improve the lives of serfs in Russia</span>
The Chinese people invented the Seismometer during the Han dynasty to help predict natural disasters. The Seismometer measured the motion of the ground, and things included of seismic waves such as, earthquakes, volcanoes, and other things that involve explosions that are generated by seismic waves.