Which one of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon?

Question

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In eukaryotes, the transcription of a gene can be influenced by proteins that bind far from the promoter, such as enhancers and silencers. These regulatory elements can be located upstream or downstream of the gene, thousands of base pairs away. In contrast, prokaryotic genes are typically regulated by operons, which consist of several genes that are transcribed as a single unit and are under the control of a single promoter. This limits the range of regulatory signals that can affect the expression of these genes. Therefore, the ability of eukaryotic genes to respond to a far greater variety of regulatory signals is mainly due to the presence of distal regulatory elements that can interact with the transcription machinery and modulate gene expression.

Which One of the Following Is the Main Reason That