Me which answer correctly inserts grouping symbols so this expression has a value of 25? 12 - 7 + 2 • 4 + 6 a. (12 - 7) + 2 • (4 + 6) b. (12 - 7 + 2) • (4 + 6) c. (12 - 7) + (2 • 4 + 6) d. 12 - (7 + 2) • (4 + 6)

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