How Does the Antibiotic Rifampicin Prevent Transcription of RNA

Multiple Choice

How does the antibiotic rifampicin prevent transcription of RNA?

A) Rifampicin blocks binding of RNA polymerase to the promoter.
B) Rifampicin prevents chain elongation by preventing formation of the phosphodiester bond.
C) Rifampicin prevents the chain termination, so transcripts are too long and are rendered nonfunctional.
D) Rifampicin blocks ribosomal RNAs from forming functional ribosomes.
E) Rifampicin blocks translation by preventing the mRNA from being processed.