All of the following are examples of external interference except A. static on a telephone line preventing a receiver from getting a message. B. a noisy party in a restaurant distracting a couple's conversation. C. a student missing a teacher's main point because she is worried that she may have left her car unlocked. D. a honking horn preventing someone from hearing a police officer's directions.

C. a student missing a teacher's main point because she is worried that she may have left her car unlocked.  

Explanation:

All of the following are examples of external interference except a student missing a teacher's main point because she is worried that she may have left her car unlocked.

External interference is any barrier occurring outside listener or speaker which prevents him/her from proper communication and it may be auditory or visual. example, is the loud boom of music from the neighbors apartment. On the contrary, internal interference is any internal barrier to communication such as worry and anxiety

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your answer is rising unemployment and inflation.