Which nineteenth century development first set the stage for future global communications?

One specific historical event or development during the period 1786-1861?

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.

Donald trump will plan to use his emergency powers to build the wall between the us and mexico, instead of shutting down the government again?