What Are Advantages of Root Meristems Originating at the Pericycle

What are advantages of root meristems originating at the pericycle, rather than at other root structures (e.g., the epidermis) ?

A) New roots form only at the tips of pre-existing roots, reaching deep water sources.
B) New roots are directly connected to the xylem and phloem of pre-existing roots.
C) New roots form outside of the Casparian strip and can absorb more nutrients.
D) New roots can sprout from any location (i.e., not just nodes) on pre-existing roots.