Which is an example of diplomacy? A. The U. S. wants to keep an open trading relationship with Europe.
B. The U. S. declares war on Japan after the attack at Pearl Harbor.
C. The U. S. sends people to discuss environmental issues with China.
D. The U. S. invades Iraq to get rid of its leader, Saddam Hussein.

C. The U.S sends people to discuss environmental issues with China

Explanation:

Diplomacy is the practice of influencing the decisions and conduct of foreign governments or intergovernmental organisations through dialogue, negotiation, and other nonviolent means. Diplomacy usually refers to international relations carried out through the intercession of professional diplomats with regard to a variety of issues and topics.

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)