Wars, famine, natural disasters, etc..
The correct answer to this open question is the following.
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The Tlaxcalan leaders joined the Spanish conquistadors. What this suggests about the relationship between the Tlaxcalans and the Aztecs was that teh Tlaxcalans were enemies of teh Aztecs.
And this is correct because the Aztecs were great warriors that wage war and took prisoners. The Great Aztec Empire was a dominant one, and force other Mesoamerican Indian tribes to pay tribute. So we can say that those other small tribes or less powerful tribes had to pay tribute if they wanted to be on peaceful terms with the Aztecs.
That is why the Tlaxcalans and other tribes such as teh Chilollans decide to join forces with Hernan Cortés and teh Spanish conquerors. Together, they showed strong opposition to the Aztecas. And that was a good advantage, considered that the Spanish conquerors had horses, spades, blades, and fire weapons that impressed the Native Indians.
Answer: William Jennings Bryan
Explanation:
William Jennings Bryan was a Nebraska politician who was nominated by his party, the Democratic party, to be their Presidential nominee in 1896 after he gave a rousing speech which today is known as the Cross of Gold speech in support of the bimetal/silver standard.
The standard called for the use of both gold and silver to back the American dollar as opposed to using just gold and was strongly supported by the lower and some middle class. The standard however would have brought high inflation as well as making it harder for the US to trade with other countries.
William Jennings lost the election and the US continued with the gold standard.