Sandburg alludes to B. famous battlefields in this passage.
The battle of Gettysburg happened during the American Civil War, the battle of Ypres occurred during WWI, as well as the battle of Verdun. He is referring to these famous battles and the fields where they happened because he wants to make a powerful impact on the reader/listener.
The Berlin wall was constructed in August1961 and demolished in November 1989, so that's 28 years: the correct option is option c.
Johnson believed that the rights of the Emancipation Proclamation and its guarantees were enough to secure the civil rights of the African-Americans. He believed the bill was completely unnecessary.