**Core Concept**
Ebola virus is a member of the Filoviridae family, causing severe hemorrhagic fever in humans. It primarily affects the vascular endothelium, leading to severe bleeding and organ dysfunction.

**Why the Correct Answer is Right**
The Ebola virus infects and causes damage to the endothelial cells lining blood vessels, leading to increased vascular permeability and subsequent hemorrhage. This damage is mediated through the interaction of the virus with the host cell's nucleic acid and subsequent replication, resulting in the release of pro-inflammatory cytokines and chemokines. The virus also targets and damages the liver, spleen, and lymphoid tissues, further contributing to the severity of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we will proceed with the information given.
**Option B:** This option is also not provided, so we will move on to the next.
**Option C:** This option is not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
The Ebola virus disease (EVD) has a high mortality rate, ranging from 25% to 90% depending on the strain and quality of care. Early recognition and treatment are crucial in reducing mortality.

**Correct Answer: D.**