In the late 19th century what accelerated the development of virtually every other industry ? Is it railroads ,canal-building, the telegraph, oil and gas

Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?

Germany italy and japan formed the tripartite pact in part because they: a. add chicken wings to the united states to stay out of world war ii b. share the ruling philosophies based on communist economics c. resented the agreements they were forced to sign at the munich conference d. selena territories were threatened by aggressive foreign states

During 1915-1917, u-boats attacked not only enemy ships but also