In the late 19th century, immigrants arrived in large numbers on the U.S coast from China for the primary purpose of working on the Transcontinental Railroad.
B. 9; appointed for lifetime terms
The answer is B: U.S.S. Maine.
Pearl Harbor occurred in 1941, when Japan bombed it and brought the US into WW2, and the U.S.S. Arizona was one of the battleships destroyed during the attack. Also, San Juan Hill was the battle during the US-Spanish War then-commander Teddy Roosevelt fought in.
Egypt is the civilization that built pyramids and mummified their rulers.
Hope that helps! :)