Answer:
The correct answer is option D: "Some ancestors of Homo sapiens have not yet been identified".
Step-by-step explanation:
It is true that some ancestors of modern humans (Homo sapiens) have not yet been identified and paleontologists are still working into finding evidence to figure out the characteristics of this missing ancestors. This information is supported by the diagram, which only uses the term "Common ancestor" to depict for instance that the common ancestor of Homo neanderthalensis and Homo sapiens as not yet been identified.