Gorter and grendek experimeny bio

answer is C, can someone explain what is going on

hi

the experiment proves that the plasma membrane is a lipid bilayer
the total surface area of a single layer extracted is double that of the surface area of a red blood cell, so the lipids must be folded onto themselves, answer C)

Options A) and D) are irrelevant, the experiment cannot tell us if there are proteins/glycolipids in the membrane