​An Adult Male Sparrow Sings Its Normal Song ____

question 77

Multiple Choice

​An adult male sparrow sings its normal song ____.

• A)if he hears the song during a sensitive period early in his life
• B)only when he hears a female bird singing​
• C)if his own species' song is the first song he hears when young​
• D)regardless of whether or not he has ever heard his species' song from another bird​