Please help!!!
Solve the open sentence -3 ≤ n + 6 ≤ 7

A) n ≤ - 9 and n ≤ 6
B) n ≥ - 9 and n ≤ 1
C) n ≤ 3 and n ≤ 7
D) n ≥ 9 and n ≤ 7