What function does `HNO_(3)` serve in the reaction of benzene with `I_(2)` to produce iodobenzene ?
A. The `HNO_(3)` convrert the `overset(o+)I` to `I_(2)`
B. `HnO_(3)` serve as catalyst
C. `HNO_(3)` convert `I_(2)` to HI
D. `HNO_(3)` convert `I_(2)` to `overset(o+) I`