Read the following SAT test question and then click on a button to select your answer.

What is the equation of the line parallel to the x-axis and four units above the x-axis?

(A) x = -4
(B) x = 4
(C) y = -4
(D) y = 0
(E) y = 4

来源:可可英语 http://www.kekenet.com/sat/201601/423816.shtml