An Adult Patient Is to Receive Two Medications IM

An adult patient is to receive two medications IM.Which action by the nurse is most important in order to mix the medications in one syringe?

A) Assess for the presence of adequate muscle mass.
B) Ensure that the combined medication amount is less than 2 mL.
C) Determine the compatibility of the medications.
D) Use a needle that is 25 gauge.