单项选择题


SECTION A CONVERSATIONS
In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the conversation.
Why is it important to quick freeze fresh food

A.The cells of plants and animals are damaged by slow freezing.
B.It saves time in the food production process.
C.It reduces the amount of energy required to freeze the food.
D.The food defrosts more quickly.