Which statement accurately distinguishes the roles of the wrapper and source description in a mediated schema?     The wrapper requests and parses data from the sources, while the source description converts data from the source schemas and values into the global representation.   The source description requests and parses data from the sources, while the wrapper converts data from the source schemas and values into the global representation.   2.The wrapper abstracts source data, while the source description requests and parses data from the sources.   The source description abstracts source data, while the wrapper requests and parses data from the sources.

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