C
Natural disaster can be a long-term or short-term and can have large or small impact on the company. However, as the natural disasters are unpredictable and infrequent, they are best considered as discontinuous. Incorrect Answers: A: Natural disaster can be a short-term, but it is not the best answer. B: Natural disaster can be a long-term, but it is not the best answer. D: Natural disaster can be of large impact depending upon its nature, but it is not the best answer.