Here's a problem to solve: Which statement best describes the process of respiration?

Among the 4 following options, which is the correct answer?

- A: Oxygen and sugar are used in the process that provides energy to cells; water and carbon dioxide are its waste products.
 
- B: Water and sugar are used to in the process that provides energy to cells; oxygen and carbon dioxide are its waste products.
 
- C: Oxygen and carbon dioxide are used in the process that provides energy to cells; sugar and water are its waste products.
 
- D: Carbon dioxide and sugar are used in the process that provides energy to cells; water and oxygen are its waste products.
 