The answer to your question is, Tank trucks marked with hazardous materials.
Hope i could help :)
An island is a piece of land surroinded by water. Hawaii and The Keys are examples
Most part of the rest of North America is cold in the winter and warm in the summer, with moderate precipitation. Some areas have mild winters and long, hot summers and others have harsh winters and short summers
1. B 80 feet
since the contour lines go by 25 B is between 75 and 100 and the only option left is 80
2. C 135 feet
point X is above 125 feet in elevation already and the only option is 135