Correct choice is (c) AlignACE
The best explanation: The Gibbs sampling algorithm can identify multiple motifs in a sequence in a sequence set using iterative masking procedure. It is used in AlignACE whereas BEST is a suite of four motif discovery tools integrated in a graphical user interface. Also, Consensus program finds motifs in a set of unaligned sequences and PhyloCon builds on this framework by modeling conservation across orthologous genes from multiple species.