Bird flu is likely to occur( )there are a lot of birds,ducks or chickensA.where B.which C.what D.whether

Bird flu is likely to occur( )there are a lot of birds,ducks or chickensA.where B.which C.what D.whether
Bird flu is likely to occur( )there are a lot of birds,ducks or chickens
A.where B.which C.what D.whether

Bird flu is likely to occur( )there are a lot of birds,ducks or chickensA.where B.which C.what D.whether
A.where