Describe the location of structures in the perirenal space, specifically those situated in the superior, anterior, and medial aspects of the kidney.
Multiple Choice:

a) The structures located in the perirenal space include the adrenal glands, situated superior, anterior, and medial to the kidneys.
b) The perirenal space is an empty anatomical region with no structures.
c) Structures in the perirenal space are always posterior to the kidneys.
d) The perirenal space contains only blood vessels, with no other anatomical structures.