If a graph is an Euler Circuit that mean that it can be traversed and begins and has all even verticies. This allows you to start and stop at the same verticie.
B is correct. Explanation Below: --- Line A never intersects Line B, as they are parallel lines-the slopes are the same-and parallel lines never intersect. Line A's Slope: (9-5)/(-1-1) = -2 Line B's Slope: (-6-2)/(4-0) = -2 --- Hope this helps!