Question

the united states and canada share the worlds longest border between two nations. approximately how long is the u.s.-canadian border?
2,250 miles
51,910 miles
5,525 miles
12,739 miles

Explanation:

The U.S.-Canadian border is approximately 5,525 miles long (land border; the total including maritime is different, but the land border length among the options is ~5,525 miles).

Answer:

C. 5,525 miles (assuming the options are labeled as A:2,250, B:51,910, C:5,525, D:12,739)