Study the map above. Which city is located at approximately 51° N, 0°? A. London B. Budapest C. Rome D. Lisbon

I think the answer is London.

In map coordinates, the number of degree indicates how far that location is located compared to the center of the earth. 51° N indicates that some part of the country is located on 51° northwise from the equator, and some part of it is exactly located within the equator (Greenwich is a famous place in London that is known to be located exactly in the middle of the equator)

51 N, 0 W would be the coordinates of London