I believe the answer is: D. Atlantic ocean
The panama connect the Atlantic ocean (in the northern part) and the Pacific Ocean (in the southern part)
Due to the Potential trading opportunities that created by this canal, many countries involved in a conflict to take control of this canal
Less demand for skill workers in the 1800's is what mass production led to in the 1800s.
Trumps wall...... (NOT) he never built it lies!!!!!
- The terrain
- The weather
- the border and surveillance
- the river