Explanation: 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.