Which group of people do you think started using abbreviations like bc and ad? why do you think this?

Why is it useful for historians to base certain studies on the analysis of historical periods

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.

Do you think the cartoonist has a positive or negative view of bryan? why?