When following aseptic procedures for withdrawing from a vial, what should the pharmacy technician do first after gathering all necessary materials for the manipulation?

A) Pull back on the plunger to clear the neck of the syringe.
B) Remove any air bubbles.
C) Swab all rubber tops with alcohol and allow the alcohol to dry.
D) Hold the ampule at a 20-degree angle toward the side of the hood.

C