If you're really an eligible woman and are searching for Mr. Right, then the chances are you will be impressed by a man's physical appearance - b.
All of the other answers in this question are highly doubtful. However, I'd like to mentiond this question is slightly sexist towards females.
Nationalism during the 19th century in the entire world, not just America, led to great amounts of violence and imperialism, but for America it manifested itself in the Civil War.
Mountains, valleys, plains, costal ghats
The years 1865-1877 was the so-called Reconstruction Era. The Reason for this reconstruction was the devastation of the country during the Civil War.
Additionally, the South had to be transformed from the point of view of the North: with slavery abolished, many social changes had to be introduced - this was the other reason for Reconstruction.
