**Core Concept**
The question is testing the concept of glycogen storage diseases, specifically the type characterized by large intracytoplasmic glycogen storage. This condition is due to the accumulation of glycogen within the cytoplasm of cells, particularly in the liver and muscles, resulting from an enzymatic defect.

**Why the Correct Answer is Right**
The correct answer is related to McArdle's disease, also known as Glycogen Storage Disease Type V (GSD V). This condition is caused by a deficiency of the enzyme myophosphorylase, which is responsible for breaking down glycogen into glucose-1-phosphate in muscles. As a result, glycogen accumulates within the cytoplasm of muscle cells, leading to muscle weakness, cramps, and fatigue. The accumulation of glycogen is visible under the microscope as large, foamy vacuoles within the muscle fibers.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specifically relate to the accumulation of glycogen within the cytoplasm of cells. While glycogen storage diseases do involve the accumulation of glycogen, this option is too broad and does not specify the correct condition.

**Option B:** This option is incorrect as it is related to Pompe disease, a glycogen storage disease characterized by the accumulation of glycogen within lysosomes, not the cytoplasm.

**Option C:** This option is incorrect as it is related to Cori's disease, also known as Glycogen Storage Disease Type III (GSD III). This condition involves the accumulation of glycogen within the liver and muscles, but it is not characterized by large intracytoplasmic glycogen storage.

**Clinical Pearl / High-Yield Fact**
McArdle's disease is a classic example of a glycogen storage disease that is inherited in an autosomal recessive pattern. It is essential to remember that this condition presents with muscle weakness, cramps, and fatigue, particularly after exercise, and that the diagnosis can be confirmed by measuring the activity of myophosphorylase enzyme in muscle biopsy samples.

**Correct Answer:** C. Cori's disease is Glycogen Storage Disease Type III (GSD III).