Answer:
The belief that races are populations of people whose physical differences are linked ... american racism assumes different forms in different historical moments
Explanation:
heres the answer shawtyyy
I would say B manifest destiny
<span>The armies became immobile because of trench warfare. avoid the problem of fighting allied powers on two fronts. ... Economic hardships brought on by the war resulted in the downfall of the czar.</span>
The answer is B, French and American troops failed to retake the city.