Why would Sudan have the slowest diffusion rate when compared to potassium permanganate and malachite green?

A) Sudan has a larger molecular size than potassium permanganate and malachite green, leading to slower diffusion.
B) Sudan has a higher concentration than potassium permanganate and malachite green, resulting in slower diffusion.
C) Sudan has a lower molecular weight than potassium permanganate and malachite green, causing slower diffusion.
D) Sudan has a lower viscosity than potassium permanganate and malachite green, contributing to slower diffusion.