In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden.
After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?

A. With the help of bulliform cells.

B. With the help of casparian strips.

C. With the help of vascular bundles.

D. With the help of stomatal apparatus.

Please do not use chat terms. Example: avoid using "grt" instead of "great".