What substance is used to cap the great pyramid?

it allows businesses to raise prices on basic goods. it allows consumers to spend more money on products. it increases government revenue to fund public projects. it provides more money for government assistance programs.

explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".