Logically, Which of These Should Cast the Most Doubt on the Relationships

Multiple Choice

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

A) None of the organisms depicted by the tree ate the same foods.
B) Some of the organisms depicted by the tree had lived in different habitats.
C) The skeletal remains of the organisms depicted by the tree were incomplete (i.e., some bones were missing) .
D) Transitional fossils had not been found.
E) Relationships between DNA sequences among the species did not match relationships between skeletal patterns.