Human Herpesvirus 8 Produces a Viral Homologue of the V-IRF $\alpha$

Human herpesvirus 8 produces a viral homologue of the v-IRF protein.Which of the following describes how this viral homologue inhibits the interferon pathway?

A) It binds to the interferon promoter and inhibits transcription.
B) It stimulates the expression of the Mx protein.
C) It blocks the activation of the PKR enzymes by double-stranded RNA.
D) It prevents binding of interferon $\alpha$ to its receptor.
E) It inactivates the caspase enzymes.