Passage task 156: Before reviewing the calculation method, a service improvement unit examines this version. A Victorian senior class applies the information to an energy-and-transport investigation. Which sentence expresses the cause-and-effect relationship most clearly?

Passage task 156: Before reviewing the calculation method, a service improvement unit examines this version. A Victorian senior class applies the information to an energy-and-transport investigation. Which sentence expresses the cause-and-effect relationship most clearly?

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