Why did Stalin feel like he had no choice?

Suspicious and distrustful, Roosevelt, Churchill, and Stalin still had to work together. ... He was an alcoholic womanizer, and the Soviets supplied him with a ... But he recognized that you have to have such allies and there was no choice. ... I think the Russians probably only used a small proportion of the ...

Explanation:

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;