（3）、Which statement is true according to the passage?
A、After foods have been unfrozen, they can be frozen again.
B、Whether the freezing process is fast has nothing to do with the taste of the food.
C、To start the freezing process, it is important to lower the temperature to Zero degrees Celsius.
D、Generally, if frozen food is left unfrozen for more than twenty-four hours without being eaten, it must be thrown away.
