The following table is a list of recipes made by Xiao Ming to better meet the senior high school entrance examination: staple food rice, non-staple food roast chicken, salted duck eggs, sweet and sour fish and spicy tofu. Judging from the types of food in the diet, the nutrients lacking are vitamins, which mainly exist in vegetables and fruits. In order to make the nutrition balanced, foods containing vitamins should be supplemented.

A, beef offal mainly contains protein, so it is wrong.

B, boiled shrimp mainly contains protein, so it's not right.

C, clear water dishes mainly contain vitamins, so it is correct.

D, ice cream mainly contains water and a small amount of sugar and protein, so it is wrong.

So choose C.