Final answer:
The correct answer to the question is B. Efficient, as it best describes a fire system that is decentralized, quick, and action-oriented, characteristics that denote an effective and streamlined approach to handling emergencies.
Step-by-step explanation:
The descriptors used in the question - decentralized, quick, and action-oriented - align best with an efficient system design. Therefore, the correct answer is B. Efficient. This implies that the original fire system design was made to optimize responsiveness and minimize the time and complexity in dealing with fires.
A decentralized system allows for localized decision-making which is quicker than a centralized approach. An action-oriented design ensures that the system prompts immediate action or response, which is crucial in emergency situations like fire outbreaks.