What was one major impact of the invention of the railroad?

Apex plz i’m almost done if i get this all right

How has u. s. participation in international economic development efforts affected other countries? o a. it has made some countries decide they no longer want close ties with the united states. b. it has ended diplomatic ties with countries that refuse to participate. c. it has raised money to poor nations grow their economies. d. it has caused the united states to intervene militarily to stop human rights abuses.

Name: nicoledate: 6/18/19jasmine's bookmark is 10 centimeters long. its area is 30 square centimeters. what is the perimeter of her bookmark? sh