After world war ii, was a continued military influence on a number of islands in the pacific.

Atomic weapons testing

Explanation:

After World War II, American military influence began to grow in the Pacific islands, including the Marshall Islands. The reason for the involvement of the military was the extensive nuclear weapons testing during the 1940s and 1950s.  After observing the destruction of atomic bombs (fat man and little boy) in Hiroshima and Nagasaki, the United States understands its power and began to come up as a superpower nation in the world.

what are local authorities doing to fix the problem

explanation:

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)