Describe the anatomical location of structures that are anterior to the aorta, superior to the celiac axis, and posterior to the inferior vena cava (IVC).
Multiple Choice:

a) The described location corresponds to the position of the gallbladder.
b) Structures in this location include the pancreas and portions of the duodenum.
c) The anatomical structures in this area are part of the urinary system.
d) This location is within the retroperitoneal space, devoid of any anatomical structures.