Final answer:
OPTION C.
The correct statement is that only eukaryotic cells contain membrane-bound organelles, contributing to their greater complexity compared to prokaryotic cells.
Step-by-step explanation:
The statement that correctly supports the conclusion that eukaryotic cells are more complex than prokaryotic cells is: Only eukaryotic cells contain membrane-bound organelles. This is key to their complexity, as these organelles, such as the nucleus, endoplasmic reticulum, and mitochondria, allow for compartmentalization of cellular functions. Unlike prokaryotic cells, eukaryotic cells also have a true nucleus with its DNA surrounded by a membrane, adding to the structural complexity. Moreover, mitochondria and chloroplasts in eukaryotic cells resemble prokaryotic ancestors, which relates to the hypothesis that eukaryotic cells evolved from prokaryotic cells.