After Sitting Through a Two-Hour Lecture in Math,your Stomach Is

After sitting through a two-hour lecture in math,your stomach is growling.You have just learned about surface area and its role in mathematics.Your classmate points out that surface area is also an integral part of the absorption of nutrients

A) due to the makeup of the gastric mucosa.
B) due to the relatively large size of food protein molecules.
C) through the presence of the enormous number of villi and microvilli.
D) resulting from the large size of pancreatic enzymes on which nutrients become digested.