hi there
your answer to this is : C) vessel elements
EXPLATION:
The most distinctive xylem cells are the long treachery elements that transport water. Tracheids and vessel elements are distinguished by their shape; vessel elements are shorter, and are connected together into long tubes that are called vessels. Xylem also contains two other cell types: parenchyma and fibers.
i hope this helped you out
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FaithRawlins14