Which of the following statements is true? A- Chemical digestion includes the physical breakdown of chunks of food.

B- Mechanical digestion begins in the mouth, and includes the tearing and grinding of food with teeth.

C- Mechanical digestion uses teeth to grind food and saliva to moisten the food
making it easier to chew.

D- Chemical digestion includes the chemical breakdown of food and mixing of the food particles with the help of the tongue