For the purpose of regulating tank vessels, flammable liquids are liquids which will __________.

A
give off flammable vapors at or below 80°F (27°C)
B
have a Reid vapor pressure of 18 pounds or more
C
give off flammable vapors only above 80°F (27°C)
D
sustain combustion at a temperature at or below 100°F (38°C)
E