Consider two different protein molecules which are both spherical, but one

has a molar mass which is eight times the other. If D L represents the diffusion

coefficient in water of the larger molecule and D S represents the diffusion

coefficient in water of the smaller molecule, what is the ratio D L $/$ D S$?$

$($A$)2$

$($B$)1/2$

$($C$)1/8$

$($D$)1/4$

$($E$)8$