OG-10一问题求教

熏依草

P354：

An additional obstacle was the union that Pullman itself had formed,which weakened support among Black workers for an independent entity.

如何理解呢？第109题的答案如何从中得出？

thanks

熏依草

GG文章好长啊，要不光翻译那句话吧，嘿嘿

熏依草

谢谢GG