1. The United States developed the Internet during _____.

a. the Cold War
b. the Korean War
c. World War II
d. the Vietnam War

2. The United States has about _____ percent of the world’s population.

a. ten
b. eight
c. five
d. four

3. The United States produces about _____ percent of the world's carbon dioxide.

a. 15
b. 22
c. 45
d. 78

4. The World Health Organization is part of the _____.

a. government of France
b. African government
c. U.S. government
d. United Nations

5. Which American organization, founded during World War II, sends teachers, doctors, and advisers to struggling areas?

a. Doctors Without Borders
b. World Health Organization
c. Peace Corps
d. Red Cross