What is distinct about rap music? It features high-pitched vocals

It cannot be created without technology

It depends heavily of a strong beat, which is unusual

The lyrics are often spoken quickly and include a lot of slang

Ig I've never seen a question like this but I believe it is "The lyrics are spoken quickly and include a lot of slang"

Explanation:

Rap doesn't usually feature much singing rather than spoken words, some rap songs however have both. Rap tends to put a message out and in that it needs a lot of words so the artist will speak quickly to get more words into the song without making it really long or use slang terms to reduce the usage of full words to be able to get a clear point across

all of them except "c"

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)