The first one is, B.<span> People got injured in unsafe living spaces.
The second one is also, A. </span><span>Canal systems and railroads connected Eastern factories with Western markets, two of which were the Eerie system and the Pennsylvania chain. </span> The third one is, D. <span>Canal systems, like the Eerie system and the Pennsylvania chain, connected Eastern factories with Western markets, and so did railroads.</span>
