Answer:
the third one. many people think that it is impossible to introduce a dog into a household that already has a cat.
Give you their denotations.
A. Interrogative, question mark. "Have you ever been to North Carolina?" is a question, hence the question mark. If one is being interrogated, he or she is being questioned.
An art song is usually for solo voice and is accompanied by solo piano. (Just as a side note, I recommend listening to the Erlking by Schubert if you have time; it's a German art song (lied))
