ExplanationIf small companies can just buy credits from large ones, they don’t invest in environmental projects. If you want to discourage buying/selling, you must
prevent the transfer of credits from big companies to small companies. The best way is to
restrict credits to be used only by the company that earned them, no resale, no purchase by others.
A. This might reduce the number of extra credits large companies have to sell, but they might still sell some, and small companies might still buy instead of investing.
B. It could reduce overall trade, but if small companies in allowed industries still buy from large companies in same industry, purchase/sale continues. Out.
C. This is irrelevant to purchase/sale motivation; just timing change, still allows trade.
D. Again this could make some credits expire, but doesn’t stop purchase/sale directly; might just speed up sales, not reduce.
E. This directly prohibits selling to unrelated small companies, so small companies can’t buy credits, they must earn their own. Directly addresses the problem described.
Answer: E