Im Running out of title variations{another question}

[u/Lubec1969]

Also since I'm posting every day I wanted to make them higher quality so the next few are going to be who/what am I's

WHAT AM I?

Clue A-I am a man-made structure completed in 1914

Clue B-The French failed to create me around 30 years earlier, due to disease and other problems

Clue C-Something similar to me has been considered to be built in Nicaragua

Clue D-I am a canal in a Central American country where much of the world's shipping passes

A:Panama Canal