For the first question, the correct answer is B „The US wa in charge of Western Hemisphere”. This corollary was to allow the US in Latin America and the Caribbean and establishes the semi- colonials rights to the US over these regions. Regarding to the second question, the correct answer is A „to increase public support for the war”. Most of the population was against the US participation in the war so through the posters, famous ones such as Uncle Sam, they could changed people’s mind. The posters were the easiest way to achieve their goal because the images speaks for itself without needing big speeaches or something similar.
Answer:
The power of The US government is constrained by the separation of powers and ... and the executive branch (the president) must consent for the United States to go to war. ... As the branch most responsive to the will of the people (who elect its ... candidates so that in the next Congress your interests are better represented.