Death Cap Mushrooms Produce a Substance Called -Amanitin

Multiple Choice

Death cap mushrooms produce a substance called -amanitin.α-amanitin efficiently blocks synthesis of mRNA,but not of tRNA or rRNA in eukaryotic organisms.How is that possible?

A) α-amanitin efficiently interferes with the action of RNA polymerase I,but not RNA polymerase II or III.
B) α-amanitin efficiently interferes with RNA polymerase III,but not RNA polymerase I and II.
C) α-amanitin efficiently blocks the action of one or more basic transcription factors.
D) α-amanitin efficiently interferes with the action of RNA polymerase II,but not RNA polymerase I or III.