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 4 are based on the following conversation. At the end of the conversation, you will by give 20 seconds to answer the questions.
Now listen to the conversation. What can be inferred about the swallows mentioned in the conversation
A．They are a type of insect. B．They are a kind of fish. C．They are a type of bird. D．They are a type of pig.