Why does the United States work with other nations?

A) To protect national security
B) To improve regional trade
C) To promote human rights
D) To strengthen democracy

Akajhnanananjjijii

Economic success prussia had a very strong economy, partly due to the success of the zollverein. stronger prussian army king wilhelm wanted to build a bigger, stronger army but was blocked by the prussian landtag (parliament).-credits to google for putting answer -credits to slideshare for making answer-credits to me for putting answer on brain.ly