Answer:
D) Political secrets are valid for national security interests since they avoid any possible disputes.
Explanation:
National security interests involve protecting US political identification, structure, and organizations; encouraging commercial well-being, and supporting international organizations promoting the vital importance of the United States and its partners. Dictionary of Military and Associated Terms.
"If the singer doesn't show up" is a dependent clause. It can't stand alone because it doesn't express a complete thought.
Maybe because the masked stranger ruins the mood of the party
