Which of the following is incorrect regarding the ab initio approaches?

• A. The conventional approach to detecting a promoter or regulatory site is through matching a consensus sequence pattern represented by regular expressions
• B. The conventional approach to detecting a promoter or regulatory site is through matching a position-specific scoring matrix constructed from well-characterized binding sites
• C. The consensus sequences or the matrices are relatively short, covering 6 to 10 bases
• D. The consensus sequences or the matrices are relatively large, covering 700 to 1000 bases