Which is the correct explanation for 120°W longitude?
A. all positions along a circle that runs perpendicular to the equator and 120° west of the prime meridian
B. all positions along a circle that runs perpendicular to the equator and 120° east of the prime meridian
C. all positions along a circle that runs parallel to the prime meridian and 120° east of the equator
D. all positions along a circle that runs perpendicular to the prime meridian and 120° west of the equator