C creates a proper citation to acknowledge
I believe you are correct if not then A.I hope this helps.
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
Germany- The U.S. might be less willing to support Germany in a time of war after WW1, but would help them immensly during a time of peace.
Japan- The U.S. might be less willing to support Japan during a time of war, but would help Japan during a time of peace.
Mexico- The U.S. might not help Mexico during a time of war (because of Trump), but would probaly help Mexico during peace.
Hope This Helps!