When Studying the Replication of Viroids and Hepatitis Delta Virus,which $\alpha$

When studying the replication of viroids and hepatitis delta virus,which of the following allows scientists to distinguish which of the three cellular RNA polymerases is required?

A) The sub-cellular location of each RNA polymerase.
B) Whether the polymerase requires an RNA primer or not.
C) Whether the polymerase can synthesize mRNAs or not.
D) Whether the polymerase will use an RNA molecule as a template.
E) The sensitivity of the RNA polymerase to the toxin $\alpha$ -amanitin.