What is the Function of RNA-Dependent RNA Polymerases in RNAi

Question

What is the function of RNA-dependent RNA polymerases in RNAi?
A) They prevent the spread of the RNAi pathway by replicating the target RNAs.
B) They help amplify the RNAi response by replicating the target RNAs.
C) They produce additional copies of the siRNAs to ensure that the RNAi response is sustained and spread.
D) They are viral proteins that prevent the spread of RNAi by preferentially replicating siRNA sponges.

Accepted Answer

The RNA interference (RNAi) response can be amplified in some organisms using RNA-dependent RNA polymerases. In these cases, RNA-dependent RNA polymerases use siRNAs as primers to produce additional copies of double-stranded RNAs that are then cleaved into siRNAs.