Why does auxin move through the plant slower than sucrose does?

Why does auxin move through the plant slower than sucrose does?
A) Auxin transport is active (requires energy) while sucrose transport is passive.
B) Auxin is transported by diffusion while cotransporters are involved in sucrose transport.
C) Auxin transport through phloem is slower than sucrose transport through parenchyma cells.
D) Auxin transport through parenchyma cells is slower than sucrose transport through phloem.
E) Both auxin and sucrose are transported through phloem and parenchyma cells, but auxin is a bigger molecule and moves slower by diffusion.