What Is the Best Explanation for the Microvilli on the Apical

Multiple Choice

What is the best explanation for the microvilli on the apical surface of the proximal convoluted tubule (PCT) ?

A) They increase the surface area and allow for a greater volume of filtrate components to be reabsorbed.
B) Their movements propel the filtrate through the tubules.
C) They increase the amount of surface area that comes in contact with the blood's plasma to help activly excrete toxins.
D) They hold on to enzymes that cleanse the filtrate before reabsorption.