What is a classified unilateral order that relates to the nation's security called?

All of the following are public goods EXCEPT

A. public parks. B. clean air. C. food products. D. national defense.

America maintains a perpetual lease to the site of the ________________, owing to a 1901 amendment to a joint congressional resolution known as the Platt Amendment.

Fill in the blank(s) with the appropriate word(s).