**Core Concept**
Ergonomics is a crucial aspect of occupational health, focusing on designing workspaces to minimize physical strain and prevent musculoskeletal disorders. In this context, the correct answer relates to the application of ergonomic principles to prevent neck problems.

**Why the Correct Answer is Right**
The correct answer is related to the concept of **postural support**, which aims to maintain a neutral spinal posture and reduce muscle fatigue. A desk with a table top designed to prevent neck problems typically features a **raked or sloping surface**, encouraging users to work with their monitor at eye level and their shoulders relaxed. This design helps reduce the risk of forward head posture, a common contributor to neck pain and discomfort.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the question, as it does not address the specific context of preventing neck problems.
**Option B:** While this option might seem plausible, it is not directly related to the ergonomic design of a desk to prevent neck problems.
**Option C:** This option is incorrect because it refers to a different aspect of ergonomics, specifically the design of a chair, which is not the focus of the question.

**Clinical Pearl / High-Yield Fact**
When designing or selecting a workspace, remember that a **raked or sloping surface** can help reduce the risk of musculoskeletal disorders, including neck problems, by promoting a neutral spinal posture and reducing muscle fatigue.

**Correct Answer: A. Ergonomic design.**