Final answer:
The statement supported by the cladogram is D. The salamander does not produce an amniotic egg, as it is part of the frog lineage and not in the clade Amniota which includes organisms that share this characteristic.
Step-by-step explanation:
The statement supported by the cladogram is D. The salamander does not produce an amniotic egg. In the context of phylogenetic trees and cladograms such as the ones described in the question, amniotic eggs are a key feature that distinguishes some vertebrates from others. According to the information provided, lizards, rabbits, and humans all descend from a common ancestor that had an amniotic egg, which places them in the clade Amniota. The salamander, however, is part of the frog lineage and therefore does not share this characteristic. This indicates that the salamander lays eggs that are not amniotic, usually in aquatic environments, which is consistent with the typical reproductive methods of amphibians.