ANS:C - Stress in concrete x area of concrete + Stress in steel x area of steel

According to the load factor method, the permissible load W on a short column reinforced with longitudinal bars and lateral stirrups is determined by considering the stresses in both the concrete and the steel reinforcement. The load factor method takes into account the capacity of both the concrete and the steel to withstand the applied loads. Therefore, the permissible load W would be calculated based on the combined contribution of the concrete and the steel reinforcement. However, none of the provided options accurately represent the load factor method. In reality, the permissible load W on a short column would be determined by considering various factors such as the compressive strength of the concrete, the yield strength of the steel reinforcement, and any applicable safety factors or design codes. Therefore, the correct option would be "None of these," as the load factor method involves a more comprehensive analysis of both the concrete and steel reinforcement, rather than a simple multiplication of stresses by their respective areas.