The diagram illustrates how $\textit{Homo sapiens}$ (modern humans) may have developed from earlier ancestors. Which statement about modern humans and their ancestors is correct?
- AThey are in the same species and the same genus.
- BThey are in the same species but not the same genus.
- CThey are in the same genus but not the same species.
- DThey are neither the same species nor the same genus.