Act English question

Katherine15
Mon, 25 Aug 2014 15:47:34 +0000

As early as 1865, there had been proposals for a New York subway, but (that) took decades to resolve the many political, financial , and technical problems. A . No change b. it. C. Those. D. Delete The answer is b. I chose c because I just thought proposals are plural, and it might fit the sentence better. Thanks for helping !