Concept:In a dicot stem, vascular bundles are arranged in a ring, with xylem toward the inside and phloem toward the outside.Explanation:The xylem is found more internally (toward the centre) than the phloem.The cambium lies between the xylem and phloem, not between cortex and vascular bundles.Vascular bundles are not randomly scattered; that is typical of monocot stems.The cortex lies inside the epidermis, so the cortex does not encircle the epidermis.Answer:Option A: the xylem is more interiorly located than the phloem.