While driving to work Pedro hears a radio advertisement for a new restaurant.Throughout the day,the tune associated with the advertisement keeps running through his head.Pedro's inability to stop thinking about the tune best illustrates the nature of

A) free-floating anxiety.
B) a phobia.
C) an obsession.
D) a compulsion.

Pedro's inability to stop thinking about the tune associated with the restaurant advertisement suggests that he has an obsession, which is a persistent and intrusive thought or idea that is difficult to control or get rid of. It is not a phobia because he does not experience an overwhelming and unreasonable fear or aversion towards anything related to the restaurant or its tune. It is also not a compulsion because he is not driven to perform any particular behavior or action in response to his thoughts about the tune. Free-floating anxiety refers to a general sense of unease or worry that is not tied to a specific trigger or situation, and does not apply in this scenario.