Which of the Following Statements About Rate-Of-Rise Detectors Is MOST

Which of the following statements about rate-of-rise detectors is MOST accurate?

A) Rate-of-rise detectors are not suitable for areas where arc welding is done.
B) Rate-of-rise detectors are also known as visible products-of-combustion detectors.
C) Rate-of-rise detectors are less reliable than fixed-temperature detectors, and are frequently subject to false activations.
D) Rate-of-rise detectors can initiate an alarm at a temperature below that required for initiating fixed temperature devices.