In Colder Temperatures,why Are Alcohol Thermometers Preferred to Mercury Thermometers

In colder temperatures,why are alcohol thermometers preferred to mercury thermometers?

A) Mercury freezes at -39°C,whereas alcohol freezes at -120°C.
B) Alcohol thermometers are generally more accurate,especially in cold temperatures.
C) Alcohol thermometers are less expensive and more easily replaced if broken in extreme temperatures.
D) Mercury is poisonous and is rarely used in modern thermometers any more.

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