D-Glucose and D-Mannitol Are Similarly Soluble,but D-Glucose Is Transported Through

D-Glucose and D-mannitol are similarly soluble,but D-glucose is transported through the erythrocyte membrane four times as rapidly as D-mannitol.What is the most likely explanation?

A) D-glucose undergoes simple diffusion more rapidly than mannitol because glucose is less polar.
B) D-glucose and D-mannitol enter the erythrocyte via an ion-gated channel.
C) D-glucose and D-mannitol are transported via a system that distinguishes the two sugars.
D) D-glucose flux through the membrane is linear whereas D-mannitol flux is described by a hyperbolic curve.
E) None of the above provides the explanation.