The correct answer to this question isliberty. The concept of these ships derived from the British, but the design came from the United States. The US-made the ships low cost and simple to construct. Along with that, the United States had the ability to mass-produce the ships. Between the years of 1941 and 1945, American shipyards produced 2,710 of these ships.
During that time, it costs two million dollars to produce the ships, which today would cost thirty-six million dollars to produce. After the war was completed, 2,400 of the liberty ships survived, while the rest were destroyed for reasons like gunfire.