Engineer: Wide roads free of obstructions have been shown to encourage drivers to take more risks. Likewise, a technical fix to slow or reverse global warming by blocking out a portion of the sun' s rays would encourage more carbon dioxide emissions, which might cause more global warming in the future. The engineer's argument can most reasonably be interpreted as invoking which one of the following principles? ['Problems created by humans require human-created solutions.', 'Conditions that create a feeling of security also encourage risk taking.', 'Technical fixes cannot discourage risk-taking behavior.', 'Technical fixes are inevitably temporary.']