The specification for an aircraft bolt calls for it to be tightened to 40 ft lbs ± 2.3 ft lbs.
If t is the torque applied to the bolt, this is the same as:

A) |t - 2.3| ≤ 40
B) |t- 40| ≤ 2.3
C) lt-2.3| ≥ 40
D) lt - 40| ≥ 2.3