Final answer:
Ava's argument is supported by the absence of a membrane-bound nucleus.
Step-by-step explanation:
Ava's argument that the cell is a prokaryotic cell is supported by statement D, which states that the cell does not contain a membrane-bound nucleus. Prokaryotic cells do not have a nucleus, while eukaryotic cells do. So, the absence of a membrane-bound nucleus indicates that it is a prokaryotic cell.
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