Remove any signs of groupings and collect similar terms: 6(2a – h - k) - 3(a - 4h + 5k) + 2(4h - 3a - k)

A. 3a - 14h – 23k
B. 3a + 14h + 23k
C. 3a + 14h – 23k
D. 3a + 14h – 13k

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