Which of the following is a wrong statement regarding TESTCODE method?

• A. This is based on the nucleotide composition of the third position of a codon
• B. In practice, because genes can be in any of the six frames, the statistical patterns are computed for all possible frames
• C. It is implemented in the commercial GCG package
• D. It exploits the fact that the third codon nucleotides in a coding region fails to repeat themselves