Why are several structural genes regulated as a unit in bacteria?

Question: Why are several structural genes regulated as a unit in bacteria?
[A].

An accident of evolution

[B].

It allows coordinating regulation of genes with a common function

[C].

The bacteria chromosome is so small; many different genes must be controlled by the same promoter

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.