Which of the Following Aspects of Membrane Protein Movement Is

Which of the following aspects of membrane protein movement is explained by the fluid mosaic model?

A) proteins that are immobile are often esterified to cholesterol via an Asp residue
B) proteins that are mobile only in a small area are sequestered by proteins attached to the cytoskeleton
C) proteins that freely diffuse through the membrane often undergo flip-flopping
D) proteins confined to a lipid raft are linked to phosphatidylserine via and amide bond
E) none of the above