What effect did the introduction of smallpox have in the americas?
a. it contributed to the defeat of american indians.
b. it led to large numbers of deaths among european colonists in the americas.
c. it allowed american indians to quickly develop a resistance to the disease.
d. it resulted in the inability of europeans to establish colonies in the americas.

The correct answer is A. The introduction of smallpox in the Americas contributed to the defeat of American Indians.

Explanation:

Smallpox was caused by the variola virus that emerged in human populations around the year 10,000 BC. For several centuries, successive epidemics devastated the population, as the mortality rate of the disease was as high as 30% of infected patients.

After affecting the Old World for centuries, during the Conquest of the Americas it was infected by the newcomers to the Native Indians, who totally lacked of defenses against this disease unknown to them, causing a demographic collapse in the native populations. In 1520, it appeared among the Aztecs during the siege of Tenochtitlan, also provoking the death of the Aztec leader Cuitlahuac. Among the Incas the smallpox killed the monarch Huayna Capac and caused a demographic disaster in the Tahuantinsuyo, which before the arrival of the Spaniards had 14 million inhabitants, while by the eighteenth century it had only 1.5 million. In Chile, it stopped the advance of the Mapuche after the death of Valdivia.

i need the answer too man

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)