What should happen when the remote temperature sensor of a heated humidifier becomes dis-connected or fails?

1. Power to the heater should be interrupted.
2. Auditory and visual alarms should trigger.
3. The unit's outlet valve should lock closed.
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3

ANS: A