A) binds to a cell surface receptor and induces the expression of new cellular genes. B) binds to a viral peptide and presents it to the cytotoxic T lymphocytes. C) degrades viral and cellular mRNAs after it has been activated by dsRNA. D) binds to the surface of a virion and prevents it from attaching to the host cell. E) phosphorylates proteins, like eIF2a, and inhibits translation of mRNAs.