How to calculate how many equivalents of butyl iodide are used?

A) Divide the given mass of butyl iodide by its molar mass.
B) Multiply the given moles of butyl iodide by its molar mass.
C) Divide the moles of butyl iodide by the stoichiometric coefficient in the balanced chemical equation.
D) Add the moles of butyl iodide and iodine atoms in the reaction.