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Which of the following is a true statement regarding data flow diagrams? 1) Data flow diagrams emphasize the physical devices used to process, store, and

Which of the following is a true statement regarding data flow diagrams? 1) Data flow diagrams emphasize the physical devices used to process, store, and transform data. 2) Data flow diagrams emphasize the physical flow of documents or records containing data. 3) Data flow diagrams emphasize the logical flow of data in a system. Please help me to answer this question

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