Why is the ‘maximum surface temperature’ identified, for electrical equipment used in hazardous areas onboard LNG carriers?

A. The limit is on minimum surface temperature on LNG carriers as the cargo is cryogenic
B. Equipment should operate within these limits to reduce the power and boil-off consumption
C. Equipment should operate within these limits to prevent the formation of a hot surface
D. Equipment should operate within these limits to reduce the heat transfer to the cryogenic cargo