A.On the basis of steadily developing grain production, farmers in Henan
Province are further diversifying their economy.
B.Based on steadily developing grain production, farmers in Henan Province
are further diversifying their economy.
C.As steadily developing grain production, farmers in Henan Province are
further expanding their diversified economy.
D.Like steadily developing grain production, farmers in Henan Province are
further expanding their diversified economy.