Solve the open sentence.

–3 ≤ n + 6 ≤ 7



A. n ≤ 3 and n ≤ 7

B. n ≥ 9 and n ≤ 7

C. n ≥ –9 and n ≤ 1

D. n ≤ –9 and n ≤ 6