【单选题】

Questions 8 to 10 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.

What wasClarenceBirdseye surprised to learnA、fish could survive being frozen.
B．The fish were easier to catch in the winter.
C．Food can be kept frozen indefinitely.
D．Solutions that freeze slowly form large crystals.