The right answer is C. Breaking the bonds in a monosaccharide.
This phenomenon is called glycolysis.
Glycolysis is a catabolic way of transforming glucose (monosaccharide) into energy.
Glycolysis is an energy-releasing process taking place in the cytoplasm of all cells, during which glucose is degraded to provide energy. The first steps require an investment of two molecules of ATP, but the following steps will produce four.