Which of the following is one of the three main disadvantages of an import-substitution industrialization strategy?( )
选项：

A:Developed nations often provide a high level of effective protection for their industries producing simple labor-intensive commodities in which developing nations already have or can soon acquire a comparative advantage
B:The domestic firms can share and corporate with foreign firms in large international market.
C:Domestic industries can grow accustomed to protection from foreign competition and have no incentive to become more efficient
D:It may be very difficult for developing nations to set up export industries because of the competition from the more established and efficient industries in developed nations