12. You definitely cannot use any piece of art... A. that is public domain
B. with a copyright symbol
C. that is over 100 years old
D. without any indication of who made it

im assuming the answer is D. without any indication of who made it bc it would be considered plagerism if the artist ins't given proper credit

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."