It is now believed that the largest contributing factor to the decline of the Indus Valley civilization was an outbreak of disease--since there were no treatments and the density of the civilization led the disease to spread very quickly.
Copernicus said that it was the Sun that was the center of the Solar System, not Earth
Sadly, Japanese-Americans were affected greatly after Pearl Harbor. The looked to the US for help, but the army put them all in internment camps. In the 1980's, the US government admitted to wrongdoing and ended up compensating the people still alive and their family members. The correct answer is B.
Founded in the Northern states in 1854 by anti-slavery activists, modernizers, ex <span>Whigs and </span>ex Free Soilers<span>, the Republican Party quickly became the principal opposition to the dominant Democratic Party and the briefly popular Know Nothing Party. Hope this helps you! =D</span>