**Core Concept**
The selection of abutments for overdenture fabrication involves careful consideration of the remaining teeth or dental implants to ensure stability, support, and optimal distribution of forces. This process is crucial for the success and longevity of the overdenture.

**Why the Correct Answer is Right**
Proper abutment selection is based on factors such as the location, orientation, and mobility of the remaining teeth or implants. The ideal abutment should be able to withstand the forces exerted by the overdenture and provide optimal support and stability. This can be achieved by selecting abutments that are located in areas with high bone density, have minimal mobility, and are positioned to distribute forces evenly.

**Why Each Wrong Option is Incorrect**
* **Option A:** This statement is incorrect because the location of the abutment is indeed a critical factor in overdenture fabrication. Abutments located in areas with high bone density and minimal mobility are preferred.
* **Option B:** This statement is incorrect because the orientation of the abutment is also an essential factor. Abutments that are oriented in a way that allows for even distribution of forces are preferred.
* **Option C:** This statement is incorrect because the mobility of the abutment is a critical factor. Abutments with minimal mobility are preferred to ensure stability and support.

**Clinical Pearl / High-Yield Fact**
When selecting abutments for overdenture fabrication, it is essential to consider the distribution of forces and the potential for bone resorption. The ideal abutment should be able to withstand the forces exerted by the overdenture and provide optimal support and stability.

**Correct Answer: D.**