**Core Concept**
Dementia of Alzheimer's type is a neurodegenerative disorder characterized by progressive cognitive decline, memory loss, and behavioral changes. The pathophysiology involves the accumulation of amyloid-beta plaques and tau protein tangles in the brain, leading to neuronal damage and death.

**Why the Correct Answer is Right**
The correct answer is associated with the pathophysiology of Alzheimer's disease. One of the key features of Alzheimer's disease is the accumulation of amyloid-beta plaques, which is linked to the activation of microglia and astrocytes, leading to inflammation and oxidative stress. This process ultimately contributes to neuronal damage and death. Additionally, Alzheimer's disease is characterized by the deposition of tau protein tangles in the brain, which disrupts microtubule function and leads to neuronal dysfunction.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because frontotemporal dementia is a separate neurodegenerative disorder characterized by atrophy of the frontal and temporal lobes, leading to changes in personality, behavior, and language.
* **Option B:** This option is incorrect because vascular dementia is a type of dementia caused by reduced blood flow to the brain, often as a result of stroke or small vessel disease, and is not directly associated with the pathophysiology of Alzheimer's disease.
* **Option C:** This option is incorrect because Lewy body dementia is a neurodegenerative disorder characterized by the presence of Lewy bodies in the brain, which are abnormal protein clumps that disrupt neuronal function.

**Clinical Pearl / High-Yield Fact**
One key feature of Alzheimer's disease is the presence of amyloid-beta plaques, which can be detected on imaging studies such as PET scans. This can help differentiate Alzheimer's disease from other types of dementia.

**Correct Answer:** D.