Glucose is a simple component of a complex carbohydrate. In this situation, glucose is -
A: a monosaccharide, and the complex carbohydrate could be a polysaccharide.
B: a polysaccharide, and the complex carbohydrate could be a protein molecule.
C: an amino acid, and the complex carbohydrate is a fat molecule.
D: a fatty acid, and the complex carbohydrate is a protein molecule.