Answer: C. artists and observers have varying ideas of what art is.
Explanation: Everyone has varying opinions on what is classified as art. The subject matter is often taboo as artists try to push the limits and test boundaries.
Sound influenced the blues to start their own band and make it last for many years.
The answer is B. ( They do not have depth )
Explanation: being back in time all the cave men had was ink so there would be no way they could have depth.
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