Is a common recording technique that has been used in many kinds of music since the middle of the twentieth century.
a. overdubbing
b. reverberation
c. stompboxing
d. looping

The correct answer is Overdubbing.

It originated in the 1920s, but became very popular in 60s music and is still used nowadays. With today's technology, overdubbing can be achieved even with the basic PC.

Yes because in graphic design you add elements of art into one piece and/or program. although, you place together graphic designs on a computer,  you still have to know about the principles of design which is included in art.

The right answer is d