For the bacterial transcription machinery, which of the following mRNA sequences would you expect to constitute a potent transcriptional termination signal? Note that the two underlined regions in each sequence are complementary to each other.
A) 5'... UGGCCCAGUCGGAAGACUGGGCCUUUUGUUUU...3' B) 5'... UGGCCCAGUCGGAAGACUGGGCCCGCGGAGCU...3' C) 5'... UUUUGUUUUAGGCCCAGUCGGAAGACUGGGCCA...3' D) 5'... CGCGGAGCUAGGCCCAGUCGGAAGACUGGGCCA...3'