Just before taking an exam, a student eats a donut. The student's body begins to digest the donut through both mechanical and chemical processes. Which is an example of a mechanical process?

O The student's teeth break apart the donut into little pieces

O The student's salivary glands release enzymes to break down starches

O In the stomach, gastric acids break the donut down further into a liquid called chyme

O In the small intestine, enzymes produced by the gall bladder break the chyme down further