Which mechanism is NOT a way that galactose metabolism genes are regulated in concert in S. cerevisiae?

Question

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In Saccharomyces cerevisiae, or baker's yeast, the metabolism of galactose is regulated by a set of genes known as the GAL genes. These genes are regulated in concert to ensure that the enzymes necessary for the utilization of galactose are produced when needed. The mechanisms by which these genes are regulated include:
A) The promoters contain similar sequences that are recognized by specific regulatory proteins. These proteins can activate or repress the transcription of the GAL genes in response to the presence or absence of galactose.
C) Galactose serves as a coactivator for gene expression by inducing the release of a repressor from the GAL genes, thereby allowing transcription to proceed.
D) Upstream activation sequences (UAS) are similar for the different genes, which allows for coordinated regulation by transcription factors that bind to these sequences.
However, option B is not a mechanism used by S. cerevisiae for regulating the GAL genes. Unlike in prokaryotes, where polycistronic mRNA transcripts can encode multiple proteins, in eukaryotes such as S. cerevisiae, mRNA transcripts are typically monocistronic, meaning that each mRNA molecule encodes a single protein. Therefore, the regulation of galactose metabolism genes in S. cerevisiae does not involve polycistronic mRNA transcripts.

Which Mechanism Is NOT a Way That Galactose Metabolism Genes