What is the role of the viral RNA polymerase in the replication of the bacteriophage T7 genome?

A) It binds to the single-stranded DNA and prevents reannealing.
B) It helps to unwind the two strands of the viral genome.
C) It produces the RNA primer on the leading strand.
D) It produces the RNA primer on the lagging strand.
E) It can switch from RNA synthesis to DNA synthesis.