To answer this question, we need to understand the meaning of the word "either" and how it is used in the context of the sentence.
Option A) Both - This option is incorrect because it does not fit grammatically in the sentence. The word "both" is used to indicate two or more items or people together, but in this sentence, we are talking about the taste in music of a cat and a teenager separately.
Option B) Either - This option is correct because it is used to indicate a choice between two alternatives. In this sentence, it implies that the cat and the teenager have different tastes in music.
Option C) Neither - This option is incorrect because it implies that both the cat and the teenager do not share the same taste in music. However, the sentence does not provide information about whether or not they have the same taste.
Option D) And - This option is incorrect because it does not fit grammatically in the sentence. The word "and" is used to connect two items or ideas together, but in this sentence, we are talking about the cat and the teenager separately.
The correct answer is B) either. This option is correct because it accurately reflects the idea that the cat and the teenager have different tastes in music.