Which of the following is a major difference between monocot and eudicot roots?

a. in monocots, the xylem and phloem are at the periphery, whereas in eudicots, the xylem and phloem are located near the center of the root.
b. eudicot roots lack xylem and phloem, whereas monocot roots have both xylem and phloem.
c. in eudicots, the xylem and phloem are at the periphery, whereas in monocots, the xylem and phloem are located near the center of the root.
d. monocot roots lack xylem and phloem, whereas eudicot roots have them arranged at the periphery of the root.