Studies Have Shown That in the Flowering Plant Arabidopsis Whether

Studies have shown that in the flowering plant Arabidopsis whether or not a root epidermal cell develops a root hair is determined ____.

A) by the distance of the cell from the root tip
B) from the timing of cell division
C) by positional information from cells of the root cortex
D) shortly after the eight-cell embryo stage
E) by the direction of cell division