What are the skills when choosing duck meat? ()
选项：

A:After the fresh duck meat is squeezed, it can be quickly restored to its original state, and those that are not fresh cannot be restored;
B:Fresh duck skin is smooth and clean, the color is milky white;
C:Cut the duck meat with a knife, the color of the fresh duck meat is rosy, and the color of the stale duck is dark.;
D:stale duck skin Duck skin has a layer of fat film, the color is light yellow or white