Answer:
3. If you buy a new cell phone, your opportunity cost is the time you could spend talking on the phone.
Answer:
North American Free Trade Agreement (NAFTA) established a free-trade zone in North America; it was signed in 1992 by Canada, Mexico, and the United States and took effect on Jan. 1, 1994. NAFTA immediately lifted tariffs on the majority of goods produced by the signatory nations.
Explanation:
Answer:
In the first years of the Revolutionary War, George Washington and his Continental Army faced a threat that proved deadlier than the British: a smallpox epidemic, lasting from 1775-1782. Infrequent outbreaks and wariness of inoculation made his troops very susceptible to the disease. After heavy losses in Boston and Quebec, Washington implemented the first mass immunization policy in American history.
