Read the sentences. Canal systems connected Eastern factories with Western markets. Two of these were the Eerie system and the Pennsylvania chain. The railroads followed similar routes. Which best combines the sentences into one clear and engaging sentence?

The sentence should identify the Eerie system and Pennsylvania chain as examples of canal systems, then add that railroads also connected Eastern factories with Western markets. Choice D does this clearly: “Canal systems, like the Eerie system and the Pennsylvania chain, along with railroads...” Choice B is misleading because it makes the canal systems and railroads sound like examples of the Eerie and Pennsylvania chains.

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