For each of the following scenarios, suggest whether it would be more appropriate to use cost-benefit analysis, the precautionary principle, or fractional risk attribution. Explain your answers.

a. Regulating risk associated with mercury from coal-fired power plants

b. Compensating cancer patients who were exposed to chemicals on the job 20 years earlier

c. Preparing for climate change-related illnesses in the year 2050

d. Creating a new policy for nanomaterials in cosmetics and medicines

e. Preparing for diseases that might transfer from animals to humans in the future