The voting age in all elections was lowered to eighteen with the ratification of the _____ to the Constitution in _____

A newly elected president in Mexico can reappoint up to thirty-thousand positions. This is an example of _____

a. patronage b. polarization c. executive autonomy d. regulatory independence

Which of the following does not create health problems?

A. Unwillingness to exercise due to air pollution B. Short term exposure to high levels of air pollution C. Long term exposure to low levels of air pollution D. synergistic interaction of air pollutants