Respuesta :
Answer:D)the ring tone is the conditioned stimulus.
Explanation:A conditioned stimulus is a neutral stimulus that triggers response. Anytime Jake hearss the ring tone,he feels happy and content..The ring tone is the stimulus that has triggered Jake's feeling of happiness and contentment.
Answer: the ring tone
Explanation: When jakes ring tone plays, his brain immediately detects it from his phone. He recognizes this ring tone from how much he talks to his gf and the ringtone he set up for her. Because of his feelings for his gf, jake is stimulated to feel happy, content, and in love when he hears the ringtone.