Read the following statement and identify the system of classification
a. A classification system that considers not only the external features, but also internal features, like ultrastructure, anatomy, embryology and phytochemistry.
b. This system of classification was followed by George Bentham and Joseph Dalton Hooker.

• A

  Artificial system of classification

• B

  Phylogenetic system of classification

• C

  Natural system of classification

• D

  Sexual system of classification