The best answers for this questions would be:
B. To identify stars which are the same distance from Earth.
<span>This astrological signs help the research of the astronomers discover the distance of the earth. They named it, in order to keep track of the stars.</span>
<span>the type of climate that Greers most likely experience is : arid, desert-like climate due to living in the rain shadow of the Sierra Nevadas
As the excerpt explained, The joens family live on the other side of the wet climate mountain. The mountain became some sort of a shield that blocked any water containing air from coming to the eastern part of the mountain, which create a desert-like climate</span>
The approximate distance between the two cities along the roman roads choosing the route that passes by arelate would be <span>10,817 km</span>. Hope this answers the question. Have a nice day. Feel free to ask more questions.