What promise did Japan make after ratifying its new constitution following World War II?

The U.S. and other allies signed a peace treaty in San Francisco formally ending the war in 1951. With a constitution that would not permit Japan to defend itself, the U.S. had to take on that responsibility.

Explanation:

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

was found at b)south carolina