[单选题]
The diagram below shows tx6jk yz*d2+o+wf no *a simple apparatus9ld 7 fh.bzp))z9e9 f.t ijtox which uses a porous pot to model water trab.f ezd)fjl .z99h7opit 9xt)nsport in plants.
Why is a porous pot used to model water transport in the xylem?
A. It allows water molecules to flow down the capillary tube to represent water moving from leaves to roots.
B. It allows water to leave the pot through the pores, which represents water evaporating out of the stomata.
C. It represents the thick, lignified walls of xylem vessels.
D. It generates adhesion and cohesion for transporting water inside plants.
