What issue regarding North Korea has the American government been most concerned with?

North Korea's Nuclearization

Explanation:

The American government is concerned that North Korea has access to nuclear weapons.

North Korea is also a communist dictatorship, something that the American government has a big opposition to.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.

the deaths of over a million communist soldiers

post-traumatic stress disorder in veterans