单项选择题
A.He also writesB.Although he writesC.Not only does he writeD.It is not all that he writes
A.市场竞争制度的引入和普及B.人力资本产权市场的发现及市场化定价机制的逐步阐述C.出现了新的激励制度和分配制度D.对产权制度的重视、合理界定以及保护力度的加强