A qualitative risk analysis method uses nonnumerical categories such as low, medium, and high to describe the consequences and probability of risks. This method involves subjective judgment based on expertise, experience, and intuition rather than mathematical calculations. Qualitative methods are often used when it is challenging to obtain accurate numerical data, and they provide a general understanding of risks to prioritize them for further action. Option C is correct because the use of nonnumerical categories aligns with the qualitative risk analysis methodology. Option A (Quantitative) is incorrect as it involves numerical values and statistical methods, while Option B (Semi-quantitative) is a mix of qualitative and quantitative methods, usually involving ranges of numerical values.