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When a low carbon steel is undergoing heat treatment for the purposes of casehardening, what is the process that distinguishes this procedure from other hardening methods?
A) After the steel is heated above its critical temperature, it is quenched in a carbon bath.
B) After the steel is heated above its critical temperature, it is quenched in cold water.
C) After the steel is heated above its critical temperature, it is allowed to cool slowly in air.
D) After the steel is heated above its melting temperature, it is quenched in a carbon bath.
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