The gaskets for the front and rear doors of a firetube boiler should be coated with an anti-seize compound:
a. Which will act as a sealant and prevent leakage
b. So the gasket will harden and set once temperature is raised
c. Thereby allowing the gasket to move during seating
d. To prevent the gasket from sticking to the mating surfaces
e. So that leaks will show up more readily
Answer: D