As Plants Grow Above Ground by Adding New Stem and Leaf

As plants grow above ground by adding new stem and leaf tissues, the demand for water increases due to transpiration. One of the ways this demand is met is through the development of new root apical meristems. Why is it that root meristems can develop anywhere along the root?

A) Root meristems develop from the pericycle, a tissue present along the length of the root.
B) Root meristems develop from the cortex, a tissue present along the length of the root.
C) Root meristems develop wherever there is a high concentration of oxygen gas in the soil.
D) Root meristems develop wherever there is a high concentration of nitrogen gas in the soil.