Help please on this question

In all organisms, there are large biomolecules that have functions necessary for survival. These molecules are made up of smaller subunits that are provided by the food we eat. Two of these macromolecules are proteins and carbohydrates. What structural characteristics could be used to differentiate these two molecules?

A) Carbohydrates are made up chains attached to glycerol

B) Carbohydrates contains nitrogen bases held together with hydrogen bonds

C) Proteins are folded into shapes which promote their functions

D) Proteins contain carbon, hydrogen and oxygen atoms
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