Answer:
a. interference.
Explanation:
According to the textbook, a listener anxious about an upcoming exam, worried about a recent argument with a friend, or distracted by cold air in the classroom would be experiencing interference. Interference refers to any barrier that impedes communication. This barrier can be external or internal. In the case of this listener, the interference is both external, the cold air, and internal, the anxiety about an upcoming exam, and the recent argument with a friend.
