Which mechanism describes rho-independent termination of bacterial transcription?

• A. A rho factor moves along RNA to disrupt the transcription complex.
• B. A GC-rich hairpin followed by a U-rich tail causes RNA polymerase release.
• C. Termination occurs via a DNA template termination signal with no RNA structure.
• D. Transcription ends when RNA polymerase collides with a DNA polymerase.

Answer: (B)