After its defeat in the Spanish-American War of 1898, Spain ceded its longstanding colony of the Philippines to the United States in the Treaty of Paris. The decision by U.S. policymakers to annex the Philippines was not without domestic controversy.
Answer:
Option D
A survey
Explanation:
This method can involve him handing out questionnaires to try to get an idea to establish his students poor exams performance. Ideally, he can give a survey to every student. Although this may not be practical.
Zheng He is the answer for this question