## Core Concept
The question pertains to the principles of abutment preparation for overdentures, focusing on the preferable method to ensure optimal support, stability, and preservation of the remaining tooth structure. Overdentures are a type of dental prosthesis that covers and rests on the remaining natural teeth, which have been prepared to receive the overdenture.

## Why the Correct Answer is Right
The correct approach for abutment preparation in overdenture fabrication often involves minimal reduction of the tooth structure to maintain its strength and vitality. Among the provided options, **minimal or no reduction** of the abutment teeth is generally preferred because it helps in preserving the pulp vitality and supporting the overdenture effectively without compromising the health of the abutment teeth.

## Why Each Wrong Option is Incorrect
- **Option A:** This option might suggest a more aggressive approach to abutment preparation. Such an approach could lead to unnecessary loss of tooth structure, potentially compromising the vitality of the abutment teeth.
- **Option B:** If this option suggests a standard or traditional approach without specifying the extent of tooth reduction, it may not directly address the preference for minimal intervention in abutment preparation for overdentures.
- **Option C:** Similar to Option A, if this suggests an approach that is not aligned with minimal preservation of tooth structure, it would be less preferable.

## Clinical Pearl / High-Yield Fact
A key consideration in abutment preparation for overdentures is to ensure that the prepared teeth can adequately support the prosthesis without jeopardizing their own health. A common clinical pearl is that **minimal tooth preparation** is usually advocated to maintain the health and vitality of the abutment teeth, thereby ensuring the long-term success of the overdenture.

## Correct Answer: D.