An engineer is the lead designer for a new pedestrian bridge. The project manager, under pressure to meet a tight deadline, instructs the engineer to approve a design that uses a lower grade of steel than specified in the original, approved plans. The engineer's analysis shows the lower-grade steel meets the minimum safety requirements by a very small margin but significantly reduces the bridge's expected lifespan and durability. Which of the following is the engineer's most ethical course of action?
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A
Refuse to approve the design and report the situation to the appropriate regulatory agency and their employer.
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B
Approve the design but document their concerns in a private memo to the project manager.
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C
Approve the design, as the minimum safety standards are technically met.
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D
Request a meeting with the client to explain the situation and let them decide.