What Is the Function of Host Factor During the Replication $\beta$

What is the function of Host Factor during the replication of the Q $\beta$ RNA genome?

A) It delays the folding of the RNA into its final secondary structure.
B) It makes the 3' end of the genome more accessible to the replicase enzyme.
C) It adds a non-template A nucleotide to the 5' end of the minus strand.
D) It facilitates binding of the replicase protein to the coat protein start codon.
E) It prevents binding of the replicase enzyme to the 5' end of the genome.