You Need to Identify a Plant,but It Is Winter and the Leaves

Multiple Choice

You need to identify a plant,but it is winter and the leaves have fallen to the ground and mixed with leaves from other plants.The parts of flowers,fruits,and seed leaves of germinating seeds are not available either.Your best clue to identify the plants as a monocot or a eudicot is to

A) inspect the stem for woody bark,as only eudicots have woody tissue.
B) determine if there are parallel xylem tubes in the stem to identify it as a monocot.
C) determine if the roots lack phloem and xylem to identify it as a monocot.
D) cut the stem and if the vascular bundles are in a distinct ring,it is a monocot.
E) cut the stem and if the vascular bundles are scattered in the stem,it is a monocot.