Which of the following statements regarding calibration of thermometers is correct?
A. Thermometers can be calibrated by an ice-water method using a 50% ice/50% water mixture at least 2 inches deep.
B. Thermometers can be calibrated by a boiling-water method at 212°F.
C. Thermometers should be calibrated before the work shift begins.
D. If a thermometer is dropped on the floor, it should be recalibrated.
E. All of these are correct.
Answer: E
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