Choose the topic that best limits the broad subject music.
A. famous pianists
B. modern rap music
C. history of the harmonica
D. history of The Star-Spangled Banner

D. history of The Star-Spangled Banner

Explanation:

We want a topic that limits the broad subject of music, which means we want something that is as specific as possible.

Look at the answer choices:

- A: famous pianists

Well, there are numerous famous pianists: Mozart, Beethoven, Chopin, Ray Charles, Stevie Wonder... The list goes on, so this is still a very broad topic. Eliminate A.

- B: modern rap music

There is so much to talk about with regards to modern rap music: the intonations, history, famous rappers, etc. Again, this is broad, so eliminate.

- C: history of the harmonica

This is a bit more narrow, as we've cut down to one specific instrument. However, there's still so much to talk about with regards to this history: origins, makers, evolution of the structure, etc. Eliminate C.

- D: history of The Star-Spangled Banner

Ah, now this is definitely very narrow because we've chosen a very specific song to focus on. Thus, D is the answer.

D.history of The Star-Spangled Banner

Explanation:

A.famous pianists: this is a very broad category since there are many pianist and a variety of subjects can be researched upon

B.modern rap music: this again is a braod category since there are different parameters associated with rap music

C.history of the harmonica: this is relatively less broad as a subject but again a variety of aspects can be researched upon like origin, etc.

D.history of The Star-Spangled Banner: from the given options, this is the most particular one. Hence, best limits the subject of research

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