Answer:
"During his tenure, U.S. President James K. ... Polk accomplished this through the annexation of Texas in 1845, the negotiation of the Oregon Treaty with Great Britain in 1846, and the conclusion of the Mexican-American War in 1848, which ended with the signing and ratification of the Treaty of Guadalupe-Hidalgo in 1848."
True. USA is on the United Nations Security Counsel, is the largest contributor to NATO, the World Court is a branch of NATO, and the USA is a huge contributor to the ICRC.
Merchant families that ruled Italian city-states established: B. their own armies.
In the Renaissance epoch, Italy was formed by many city-states with powerful people as the rulers. They were in conflict with each other quite often. That is why these cities had their own armies to protect their merchant, their political interests and their cultural influence in the region.
<span>The country primarily affected by US industrial chemical production is Canada. The reason for this is twofold. First, Canada is a major trade partner for industrial chemicals, not only for such industries as mining and oil, but also for research. Also, as the neighbor of the US, Canada also suffers the effects of chemical production, such as acid rain in the Great Lakes area.</span>