**Core Concept**
The question is testing the concept of **retrograde amnesia**, a type of memory loss where an individual is unable to recall events that occurred before a specific point in time. This can be caused by various factors such as head trauma, stroke, or certain psychological conditions.

**Why the Correct Answer is Right**
The recollection of events that happened one week before is impaired due to the **anterograde consolidation** of memories from short-term to long-term storage. This process involves the transfer of information from the hippocampus to the neocortex, where it is consolidated and stored. If this process is disrupted, as in the case of retrograde amnesia, the individual may not be able to recall events that occurred before the point of disruption.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the question, and the correct answer is not related to the concept of **anterograde amnesia**, which involves the inability to form new memories.
* **Option B:** This option is incorrect because it refers to a different type of memory loss, **anterograde amnesia**, which involves the inability to form new memories after a specific point in time.
* **Option C:** This option is not relevant to the question, and the correct answer is not related to the concept of **anterograde amnesia**, which involves the inability to form new memories.

**Clinical Pearl / High-Yield Fact**
The **Korsakoff syndrome** is a condition characterized by retrograde amnesia, often accompanied by anterograde amnesia. It is typically caused by chronic alcohol abuse and is associated with damage to the hippocampus and surrounding structures.

**Correct Answer: D.**