Final answer:
An executive agreement, such as a trade agreement made by the President with another country, is negotiated by the president and does not require Senate ratification like a treaty would. Option c is the correct answer.
Step-by-step explanation:
An executive agreement is an example of presidential action in foreign policy and is a formal agreement negotiated between two countries but not ratified by a legislature as a treaty would be. From the provided choices, c) a trade agreement made by the President with another country is an example of an executive agreement.
These are negotiated by the president and, in the case of sole executive agreements, instantly approved by the president without needing a two-thirds vote in the Senate for ratification.
Presidential summits, military uses of force, and emergency spending measures are sharply focused foreign policy outputs, but they are not executive agreements. Notably, the Iran Nuclear Agreement was a major executive agreement that generated debate over whether it should have been a treaty.