For the Following Reaction, Which of the Following Change(s) in the IR

Multiple Choice

For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product?

A) absorption at 3300-3400 cm^-1 should disappear
B) absorption at 3300-3400 cm^-1 and 1100 cm^-1 should disappear
C) absorption at 1100 cm^-1 should disappear, a new absorption at 3100 cm^-1 should appear
D) absorption at 1650 cm^-1 should disappear, a new absorption at 3300 cm^-1 should appear.
E) none of these