All answers are correct which is number 4. When you have shortened, rephrased, or cited other people's work, it is vital that the basis of that info be specified. Using other peoples' arguments and thoughts is a normal exercise in advanced writing: it helps give power to your opinions; it helps show that you are acquainted with the argument which environs your subject; it gives penetration and diversity to your paper.
It just asks you to write 1 2 3 below each note from 1 through 4. At number 3, add the 3/4 time signature after the clef. At number 4, do the same thing at number 3 but make sure each measure has three beats. it can be easy if you start by writing the 1 2 3 below each note like they shown above.
Answer:
black and white
Best two colors, but always better together
The answer C Different Trains
