Prior to Performing a Venipuncture, Why Is It Important to Get

Prior to performing a venipuncture, why is it important to get information about whether or not the patient has eaten recently?

A) Laboratory tests can be affected by the ingestion of food and drink.
B) Meals tend to calm a patient down.
C) After eating, patients usually have enlarged veins.
D) To help evaluate on which side to perform the venipuncture.