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34. In the nineteenth century, Montreal grew into an important transportation and industrial center, aided by its many natural resources and an abundant of hydroelectric power.

d的错误我知道，但是前面的transportation 是不是改成adj与industrial 对称才正确啊，本来以为是个明显错误。。。

transportation是表示CENTER的性质,用ADJ的话,意思表达就不对了.虽说有ADJ 就尽量用ADJ 但是这里违反了原文的意思,内容不符逻辑

个人观点 供参考