The scientists did not realise that Whittles was imitating human sounds because they
A thought the clicks and whistles were some kind of music.
B had a hard time hearing the sounds under water.
C were distracted by other noises.
D were listening to the recordings at regular speed.
The correct answer is D: were listening to the recordings at regular speed.
Explanation: Scientists likely didn’t recognize that Whittles was imitating human sounds because when they listened to the recordings at regular speed, the imitations might have blended in with the natural sounds, making it difficult for them to identify the human-like qualities in Whittles’ vocalizations. If they had slowed down the recordings, they might have noticed the imitations more clearly.
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