When Referring to Attenuation in Regulation of the Trp Operon

Multiple Choice

When referring to attenuation in regulation of the trp operon, it would be safe to say that when there are high levels of tryptophan available to the organism, _.

A) transcriptional termination is likely
B) ribosomes are stalling during translation of the attenuator region
C) tryptophan is inactivating the repressor protein
D) translational termination is likely
E) the trp operon is being transcribed at relatively high levels