When geographers refer to music as a cultural signifier, what do they mean? A. Music shapes human identity.
O B. Music is written in a special form of notation.
C. Many people listen to MP3s.
D. Street musicians often play for tips.

its A

Explanation:

they mean that music is an important component of the identity and culture of  

i would think yes.

explanation:

because we have every natianlity in our country which makes us so diverse and unique. that's why in a lot of cities there are places like little italy, koreatown, chinatown.