What is the best definition of an undocumented worker?

Most countries have laws requiring workers to have proper documentation, often intended to prevent or minimize the employment of undocumented immigrants.Undocumented workers are foreign-born workers who lack the legal documentation required to work in the country in which they live.

B) an immigrant who lives and works in a country illegally.  

Explanation:

yes.

explanation:

because it let the japanese know who had the upper hand in the war.

where is the