An engineering firm is designing a novel bridge in a seismically active area using an innovative material. The long-term performance of this material has been modelled, but it carries inherent, unquantifiable risks of degradation beyond the model's timeframe. The client has been fully briefed on the innovative approach and the associated uncertainties. What is the most appropriate primary risk management strategy for the firm to adopt regarding these unknown long-term risks?
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A
Risk Mitigation, by adding redundant structural elements to compensate for any potential material failure.
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B
Risk Transference, by purchasing a comprehensive insurance policy to cover all possible failure scenarios.
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C
Risk Avoidance, by declining to use the innovative material and reverting to a conventional design.
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D
Risk Acceptance, by proceeding with the design after ensuring the client provides informed written consent acknowledging the shared uncertainties.