The temperature in a laboratory must be between 64 and 72 Fahrenheit, inclusive. If t is the temperature in the laboratory, which of the following inequalities represents this situation?
A. |t + 4| ≤ 68
B. |t - 4| ≥ 68
C. |68 - t| ≤ 4
D. |68 + t| ≤ 4