Which of the Following Represents a Legitimate Challenge or Limitation

Multiple Choice

Which of the following represents a legitimate challenge or limitation of the studies presented in the text that examine the accuracy of phylogenetic reconstruction?

A) The level of homoplasy in the experimental studies was much lower than in most studies that reconstruct phylogenies.
B) The experimental studies were performed only in viruses,not in eukaryotes.
C) Different genes evolve at different rates.
D) The experimental studies did not use an outgroup.
E) The organisms in the experimental studies had a known history.