Question

Find the range of the relation.
http://static.k12.com/calms_media/media/240500_241000/240828/1/c7794554f5a015c0a89890ba8983d1cda0e48445/01_02_LQ_4.gif

A.{–6, 6}
B.{–6, –3, 0, 3, 6}
C.{–6, –5, –3, –1, 0, 3, 6}
D.{–5, –3, –1, 1, 3}