中国支持多边贸易体制，促进自由贸易区建设。

A.China will support multilateral trade regimes and work to facilitate the development of free trade areas.

B.China will support unilateral trade regimes and work to facilitate the establishment of free trade areas.

C.China will support multilateral trade regimes and work to facilitate the establishment of free trade areas.

正确答案：China will support multilateral trade regimes and work to facilitate the establishment of free trade areas.