**Core Concept**
Acantholysis is a process in which there is disruption of intercellular connections between keratinocytes, leading to the loss of cell-to-cell adhesion. This results in the formation of suprabasal clefts and eventual sloughing of the epidermis. The primary cause of acantholysis is the disruption of desmosomal attachments between adjacent keratinocytes.

**Why the Correct Answer is Right**
Acantholysis is primarily caused by the destruction of desmosomes, which are specialized intercellular junctions responsible for maintaining cell-to-cell adhesion in the epidermis. Desmosomes are composed of cadherins, which interact with the cytoskeleton of adjacent cells to maintain cell-to-cell adhesion. When desmosomes are disrupted, the keratinocytes are unable to maintain their attachment to each other, leading to acantholysis. This process is commonly seen in autoimmune diseases such as pemphigus vulgaris, where autoantibodies target desmoglein 3, a component of desmosomes.

**Why Each Wrong Option is Incorrect**
**Option A:** The correct answer is not the cytoskeleton, as while it is involved in maintaining cell-to-cell adhesion, it is not the primary target in acantholysis.
**Option B:** The correct answer is not the basement membrane, as while it is an important component of the skin, it is not directly involved in cell-to-cell adhesion.
**Option C:** The correct answer is not the dermal-epidermal junction, as while it is an important site of attachment between the epidermis and dermis, it is not directly involved in cell-to-cell adhesion within the epidermis.

**Clinical Pearl / High-Yield Fact**
Acantholysis is a characteristic feature of pemphigus vulgaris, an autoimmune disease that can be treated with corticosteroids and immunosuppressive agents. It is essential to recognize acantholysis in skin biopsies to diagnose pemphigus vulgaris and initiate appropriate treatment.

**Correct Answer:** D.