<em>Answer: C</em>
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Explanation: C gives us a strong reason why reclamation has gotten cheaper. The nature of the mines has changed, making it less difficult to reclaim them.
B looks good EXCEPT look very carefully at the wording of the argument.
Plowing the contour of the land to have minimal soil erosion. <span>It involves plowing across hill slopes to prevent soil erosion.
Hope this helps.</span>
<span>The subagent owes the same duties to the broker's client as the broker.</span><span>
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