Which sentence best states the main idea of this passage

The correct answer is the option C: All obstacles must be overcome in order to ensure the safety of the United States.

Explanation:

It means that given the emergency of war, it is necessary for the safety of the country to be prepared, and to give more importance to that issue than to any other. So even though any other problem can be presented, no matter how important it can be, the war is always the first problem to be solved or managed.

newbie construction workers preparing to work at a job cite but are first going over safety concerns?

misty passage from the question