The correct answer is the Suez Canal in Egypt.
The others are in different continents: The Grand Canal in Europe (Venice), the Panama Canal in the Americas ( and splits the two Americas) and Erie Canal is in America (NY).
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Yes Franklin's cartoon of join or die was very effective. It had a snake that had been cut into eighths and each segment represented colonies of America. Benjamin Franklin editorial game under America's “United colonies” showing an urge to join against the British during the Revolutionary war.
8 Cuts of the snake show the separated colonies and it was a clear depiction for those colonies to join in order to make a difference in power.
It came across as a great persuasion and influence them to get organized to fight against outside enemies. The political cartoon meant a great deal in combining people against enemies.