Which of the Following Is True About Regulation of Prokaryotic

Which of the following is true about regulation of prokaryotic gene expression?

A) Genes such as rRNAs and tRNAs, which specify housekeeping functions, can be repressed or induced as required.
B) Genes that encode enzymes involved in catabolic pathways are always expressed constitutively.
C) Genes that encode anabolic enzymes are not repressible.
D) Transcriptional regulation is the most common mechanism of control in prokaryotes.
E) Translational regulation is the most common mechanism of control in prokaryotes.