Julia is trying to place a duckbilled platypus, lizard, bear, and monkey on a phylogenetic tree. She learns that the duckbilled platypus, bear, and monkey are classified as mammals. She also learns that mammals share a common ancestor with reptiles. Which additional piece of information will be most helpful to Julia to properly build her phylogenetic tree?
A
The platypus has fur like other mammals.B
The platypus does not have feathers like a bird.C
The platypus lays eggs like a reptile.D
The platypus does not have fins like a fish.