**Core Concept**
The classification of partially edentulous arches is based on the **Kennedy Classification**, which is a system used in removable partial denture design. This system categorizes arches based on the distribution of the missing teeth.

**Why the Correct Answer is Right**
The Kennedy Classification is a widely accepted system that helps in designing appropriate removable partial dentures. It considers the location and extent of the edentulous spaces, which is crucial for determining the type of support and stability required for the denture.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not accurately represent a classification system for partially edentulous arches.
**Option B:** Incorrect as it is not a recognized method for classifying partial edentulism.
**Option C:** Incorrect because, although related to dental anatomy, it does not pertain to the classification of partially edentulous arches.
**Option D:** Incorrect as it is not a standard classification used in prosthodontics for this purpose.

**Clinical Pearl / High-Yield Fact**
The Kennedy Classification is essential for prosthodontic treatment planning, as it guides the selection of the appropriate design for a removable partial denture, ensuring optimal support, stability, and retention.

**Correct Answer:**