Why Can It Be Said That Absorption Is the Reason

Multiple Choice

Why can it be said that absorption is the reason for digestion?

A) Even though digestion includes the processes of mechanical and chemical breakdown of ingested food, the optimum goal of digestion is to absorb nutrients.
B) The absorption process facilitates the emulsification of fats by breaking large fat drops into small droplets.
C) Absorption involves the grinding action of the teeth and the mechanical mixing of food as it passes through the gastrointestinal tract, thus allowing regulation of digestion.
D) Fluid balance, maintenance of core body temperature, numerous circadian rhythms, and regulation of pH and metabolic rates are included as parts of the absorption process.