Which of the Following Statements About the Construction of Phylogenetic

Which of the following statements about the construction of phylogenetic trees from molecular data is true?

A) Organisms with similar enzymes are probably closely related.
B) All organisms share identical coding sequences for each amino acid.
C) The sequence of amino acids in a polypeptide can be used to construct a phylogenetic tree.
D) Analysis of the amino acid sequence may be used to confirm parallel evolution of species.
E) Knowledge of the sequence of amino acids in a polypeptide is only useful when comparing organisms with morphological homologies.