In the SsRNA Phage Q $\beta$ The Synthesis of the Plus Strand RNA Genome from the Plus

In the ssRNA phage Q $\beta$ the synthesis of the plus strand RNA genome from the negative strand template does not require the ribosomal S1 protein.Which of the following explains why?

A) The minus strand is shorter and takes less time to replicate
B) The minus strand lacks the secondary structure that prevents replication.
C) There is no competition between binding of the replicase enzyme and the ribosome.
D) The replicase enzyme is more processive when copying the minus strand.
E) The minus strand has a lower GC content than the plus strand.