Which infrastructure development in the early 1900's did the most to increase shipping between the west and east coasts of the united states?

In a constitutional monarchy, the king or queen a. is a symbol of the nation b. runs for office c. controls the legislative branch d. has absolute control

Modern democracies function as republics in which elected officials make decisions for the majority of the people.

Most of the volcanic activity that occurs in the ring of fire is a result of the a. formation of mantle plumes away from plate boundaries. b. subduction of one plate under another. c. movement of two plates away from each other. d. sliding of one plate past another.