Read about Mason and answer the question.

Mason is given an assignment to read and compare two articles about classical music.

Which of the following sentences shows that Mason is making a comparison?

1)The first article is written for students, the second is written for musicians.
2)Both articles include information on Mozart and Beethoven.
3)One author mentions a study about the impact of classical music.
4)The second article is written with a very formal tone.