As Ronnie hears a song on the radio, she feels stressed: her heart races, her hands become clammy, ...

As Ronnie hears a song on the radio, she feels stressed: her heart races, her hands become clammy, and her breathing becomes rapid. The song is familiar because it was very popular at a time when her parents were going through a divorce that caused Ronnie intense anxiety. In this scenario, identify the following in the same respective order: the conditioned stimulus, the unconditioned stimulus, the conditioned response, and the unconditioned response.
 
  a. parents fighting; song; anxiety toward parents fighting; anxiety toward song
  b. parents fighting; anxiety toward parents fighting; song; anxiety toward song
  c. song; parents fighting; anxiety toward song; anxiety toward parents fighting
  d. song; anxiety toward song; parents fighting; anxiety toward parents fighting