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which of the following mathematical statements is correct?

A. 25m³+343n³=(5m+7n)(5m²+35n+49n²)
B. 25m³+343n³=(5m+7n)(5m²-35n+49n²)
C. 25m³+343n³=(5m-7n)(5m²+35n+49n²)
D. 25m³+343n³=(5m-7n)(5m²+35n-49n²)

with solution please​