A. p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252012.0px%2520Times%253B%2520-webkit-text-stroke%253A%2520%2523000000%257D%250Aspan.s1%2520%257Bfont-kerning%253A%2520none%257D%250Aspan.Apple-tab-span%2520%257Bwhite-space%253Apre%257D A. 价格 B.政府 p.p1%20%7Bmargin%3A%200.0px%200.0px%200.0px%200.0px%3B%20text-align%3A%20justify%3B%20font%3A%2012.0px%20Times%3B%20-webkit-text-stroke%3A%20%23000000%7D%0Aspan.s1%20%7Bfont-kerning%3A%20none%7D%0Aspan.Apple-tab-span%20%7Bwhite-space%3Apre%7D C.利润 D. 机会成本