## Core Concept
The question tests the understanding of the anatomy of sensory neurons, specifically the location of their cell bodies. Sensory neurons, also known as afferent neurons, are responsible for transmitting sensory information from various parts of the body to the central nervous system (CNS).

## Why the Correct Answer is Right
The correct answer, , indicates that the cell body of all sensory neurons is located within the dorsal root ganglion (DRG) for spinal nerves and the ganglia associated with cranial nerves. The DRG is a cluster of neurons located in the dorsal root of spinal nerves, and it is here that the cell bodies of sensory neurons reside. These neurons have a unique structure, with their cell body located outside the CNS but their axon extending into the CNS.

## Why Each Wrong Option is Incorrect
* **Option A:** The cerebral cortex is the outer layer of the brain responsible for processing sensory information, but it is not the location of the cell bodies of sensory neurons.
* **Option B:** The spinal cord is part of the CNS and contains the axons of sensory neurons, but not their cell bodies.
* **Option C:** This option might seem plausible but is not accurate based on the context of the question.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the dorsal root ganglion (DRG) contains the cell bodies of sensory neurons. Damage to the DRG or the sensory neurons can lead to sensory deficits, including loss of touch, pain, and proprioception.

## Correct Answer: D. Dorsal root ganglion.