When finding absolute location on a map or globe, we use coordinates of latitude and longitude. Longitude is a measure of what? NO LINKS!

Absolute Location describes precise locations of a place based on a fixed point on earth. The most common way to identify a location is by using coordinates such as latitude and longitude.

Longitude is measured 180° both east and west of the prime meridian. As aids to locate longitudinal positions on a globe or map, meridians are plotted and drawn from pole to pole where they meet. The distance per degree of longitude at the Equator is about 111.32 km (69.18 miles) and at the poles, 0.

i beleive a. is the only possible answer