Steam coils with a short tube length of 1.1 m or less, in comparison to steam coils with long tube lengths,
a. are more likely to freeze, even if the steam trap is properly chosen
b. are less likely to freeze regardless of steam trap choice and coil installation
c. must use 2-position steam valves to prevent freeze-up
d. are less likely to freeze if the steam trap is properly chosen and the coil is properly piped
e. will only freeze if the inlet air temperature drops to below -35 degrees Celsius
Answer: D