What factors commonly contribute to porcelain chipping in metal-ceramic restorations, and how can chipping be minimized?

• A. Thicker porcelain is more prone to chipping.
• B. Excess bonding and metal understructure prevent chipping.
• C. Thin porcelain, insufficient bonding, and occlusal overload.
• D. Inadequate occlusal support reduces chipping.

Answer: (C)