probably E, because it could lead to war, plus this goes more along the lines of world affairs.
Anschluss was the name of the union of Austria and Germany in March 1938. It happened after the collapse of the Habsburg. After the annexation, the US criticized the chaos in Germany and formulated a foreign policy in order to respond to Hitler’s aggressive foreign policy. This was a problem for the US and the allies because it showed that Hitler had no care for peace and got even more strongly with the annexation of Austria - it subsequently increased the size of Germany’s military -.
The Congress of Racial Equality (CORE) sponsored<span> most of the subsequent </span>Freedom Rides<span>, but some were also organized by the Student Nonviolent Coordinating Committee (SNCC).</span>
He believed the American people would have more money to spend so it would stimulate the economy. He stood for tax cuts to give Americans back their money.
It would be an "effective secondary source document" that best describes a chart developed 20 years after a historical event, since the information as had time to "settle"--although of course this doesn't automatically mean that the chart is "effective". hope this helps :)