I assume that the question refers to the political affiliation of the Islands (They are Islands in the Mariana Trench, in the Pacific Ocean, south of Japan) - they are politically linked to the US - the correct answer is a). For example the Mariana islands have a commonwealth status within the US.
<span>c.they are home to the world’s busiest deep-sea fishing industry .</span>
I think is full moon and new moon