**Core Concept**
The preparation of a tooth as an abutment for a Fixed Partial Denture (FPD) involves creating a taper to facilitate the removal of the restoration and to prevent fracture of the tooth. The ideal taper is a critical factor in the success of the FPD.

**Why the Correct Answer is Right**
The correct taper for a prepared tooth as an abutment for FPD is 3-5°. This range of taper allows for easy removal of the restoration and minimizes the risk of tooth fracture. A taper of 3-5° also enables the dentist to achieve a proper fit between the abutment tooth and the FPD, ensuring optimal distribution of forces and preventing excessive stress on the tooth.

**Why Each Wrong Option is Incorrect**
**Option A:** A taper of 10-15° is too steep and can lead to excessive stress on the tooth, increasing the risk of fracture.
**Option B:** A taper of 0-2° is too minimal and can make it difficult to remove the restoration.
**Option C:** A taper of 10-15° is not only too steep but also unnecessary, as it does not provide any additional benefits in terms of FPD removal or tooth stability.

**Clinical Pearl / High-Yield Fact**
When preparing teeth for FPDs, it's essential to remember the "Golden Taper": 3-5°. This optimal range of taper ensures a balance between easy restoration removal and tooth stability.

**Correct Answer:** C. 10-15°