Answer:
Xylem transports only minerals and waters from the roots. Phloem transports food materials that are prepared by the green parts of the plants to other parts of the plant. ... Xylem is the dead tissues at maturity, but no cell contents. Phloem is the living tissue, but not with the nucleus.
Almost positive that it's option C, because ultraviolet rays indeed do that, i'm not good with the study of x-rays but i'm sure it doesn't go with #3.
