Authenticated information that the Nazis were systematically exterminating European Jewry was made public in the United States in November 1942. President Roosevelt did nothing about the mass murder for fourteen months, then moved only because he was confronted with political pressures he could not avoid and because his administration stood on the brink of a nasty scandal over its rescue policies. . . . Franklin Roosevelt’s indifference to such a momentous and historical event as the systematic annihilation of European Jewry emerges as the worst failure of his presidency.”

using thtis context answer this

The source above would be most useful to a person attempting to prove a. the United States government and Franklin Roosevelt had no knowledge of the Holocaust. b. Franklin Roosevelt attempted to intervene and stop the mass murder of people of Jewish descent. c. Franklin Roosevelt ignored credible information about the mass murdering of Jews. d. the Nazis were mass murdering the Jews in what is now known as the Holocaust.

The source above would be most useful to a person attempting to prove c. Franklin Roosevelt ignored credible information about the mass murdering of Jews.