China must take exploitation and protection of the ocean for a long-term strategic task before it can achieve the sustainable development of its national economy.
B.
China must take exploitation and protection of the ocean as a long-term strategic task before China can achieve the sustainable development of its national economy.
C.
China must take exploitation and protection of the ocean as a long-term strategic task before it can achieve the sustainable development of its national economy.
D.
China must take exploitation and protection of the ocean for a long-term strategic task before China can achieve the sustainable development of its national economy.