During infection with a togavirus, the subgenomic mRNAs represent the complementary strand of which of the following?

A) The full-length positive-strand genome.
B) The 3' half of the positive-strand genome.
C) The 3' half of the negative-strand antigenome.
D) The 5' half of the positive-strand genome.
E) The 5' half of the negative-strand antigenome.