Why Robertson model was rejected

Unfortunately, though Robertson's electron micrographs of cell membranes were exceptional for their day, they failed to illustrate that many proteins penetrate the membrane bilayer, and since his images were necessarily static views, they gave no indication of the remarkable ability of proteins to diffuse later- ally ...

Unfortunately, though Robertson's electron micrographs of cell membranes were exceptional for their day, they failed to illustrate that many proteins penetrate the membrane bilayer, and since his images were necessarily static views, they gave no indication of the remarkable ability of proteins to diffuse later- ally ...

your answer is rna to the question.

i believe the correct answer is d