Which question can be answered by risk management? 

A)  How much will sea levels rise by 2100? 
B)  How can risk be eliminated entirely? 
C)  How much is a life worth? 
D)  When will peak oil be reached?

Risk management involves assessing and prioritizing risks to minimize, monitor, and control the probability or impact of unfortunate events. It does not aim to eliminate risk entirely (which is often impossible) but rather to understand and mitigate it. Therefore, it can address questions related to the valuation of life in the context of risk assessments, insurance, and safety measures, which is why option C is correct. Options A, B, and D are more related to predictions and philosophical or economic questions that are not directly answerable through risk management practices.