The tissue, cambium, which allows for increased girth of eudicotyledons when they undergo secondary thickening, is located:
a) in the vascular bundles to the outside of the phloem.
b) in the vascular bundles between the xylem and phloem.
c) at the apical meristem.
d) in the vascular bundles inside the xylem.
Answer: b) in the vascular bundles between the xylem and phloem.