Some historians contend that conditions in the United States during the Second World War gave rise to a dynamic wartime alliance between trade unions and the African American community, an alliance that advanced the cause of civil rights. They conclude that the postwar demise of this vital alliance constituted a lost opportunity for the civil rights movement that followed the war. Other scholars, however, have portrayed organized labor as defending all along the relatively privileged position of white workers relative to African American workers. Clearly, these two perspectives are not easily reconcilable, but the historical reality is not reducible to one or the other.
Unions faced a choice between either maintaining the prewar status quo or promoting a more inclusive approach that sought for all members the right to participate in the internal affairs of unions, access to skilled and high-paying positions within the occupational hierarchy, and protection against management's arbitrary authority in the workplace. While union representatives often voiced this inclusive ideal, in practice unions far more often favored entrenched interests. The accelerating development of the civil rights movement following the Second World War exacerbated the unions' dilemma, forcing trade unionists to confront contradictions in their own practices.
文章首先提出some historian的观点：二战时期美国的condition促进TU和AAC的联合，这个联合advance the cause of civil right.
TU faced a choice:是maintain prewar status quo还是promote a more inclusive approach.
TU基础鼓吹 a more inclusive approach，但是实际上更趋向于保护已确立利益。
二战时期 civil right的加速发展，加剧了TU这种是否promote inclusive approach的困境，迫使他们面对他们的矛盾。
选项A evaluate opposing viewpoints即是观点一和观点二， providing a context就是face a choice的情况
这篇文章就是在说工会和黑人之间的民权运动关系。 一些人认为是战后关系解散造成。 一些人认为是工会本身就在维持白人特权。