Im not 100% this is right,but B.system of federalism
The US didn’t win the Vietnam war, what they really did was remove troops from Vietnam which was Vietnamization but they didn’t lose or win the war.
A culture region can often be defined as "<span>A. a geographic unit determined by cultural characteristics," since many different culture regions can reside within states, countries, etc. </span>
After winning independence, Mexico Developed a Trade <span>relationship with the United States.</span><span>
Not the only United States is the closest nation from Mexico, but we're also the country that has the most capital in the world. So it would be a very good decision for Mexico to form a trading relation with the United States in order to bring profit to their country.</span>