The example of German immigrant Marcus Spiegel demonstrated that: a. the views of average Americans evolved considerably during the course of the Civil War. b. the significant Jewish population in the United States was ambivalent about the issues that caused the Civil War. c. while Jews were few in number, their role at the Battle of Gettysburg made military heroes of many of them. d. freedom motivated the immigration of Irish immigrants, but German immigrants of the mid-nineteenth century came to the United States in pursuit of economic success. e. Democrats were unwilling to go to war with a Republican president in the White House.