Final answer:
The man who signed the Panama Canal Treaty called the Hay-Bunau-Varilla Treaty was American.
Step-by-step explanation:
The man who signed, with John Hay, the Panama Canal Treaty called the Hay-Bunau-Varilla Treaty was D. American. The treaty was signed by Philippe-Jean Bunau-Varilla, who was a French engineer and diplomat, but he acquired American nationality before signing the treaty. The Hay-Bunau-Varilla Treaty granted the United States the rights to build, maintain, and control the Panama Canal Zone.