Which is the correct explanation for 30°s latitude? a. all positions along a circle that runs parallel to the equator and 30° north of it. b. all positions along a circle that runs parallel to the equator and 30° south of it. c. all positions along a circle that runs perpendicular to the equator and 30° south of it. d. all positions along a circle that runs perpendicular to the equator and 30° north of it.