Subtract (3 + 2i) from (–9 – 8i).

Subtracting (3 + 2i) from (–9 – 8i) means calculate (–9 – 8i) – (3 + 2i). Subtract the real and imaginary parts separately: (–9 – 3) + (–8i – 2i) = –12 – 10i. Therefore, the correct choice is C, –12 – 10i.

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