If you are talking about frequency in terms of waves, it is in seconds^-1
For this question I'm not too sure what you're asking because cells that transport water are basically xylem cells and these cells are hollow with nothing in them, and they transport water against gravity because of transpiration pull, capillary action and root pressure.
The cells that I know of with many mitochondria for transport would be the phloem so that the mitochondria can carry out cellular respiration to release energy for the translocation of sucrose.
Answer:
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The answer to the question that you are asking will be the letter A because point b would be sunrise I hoped this helped