Price discrimination occurs only in monopolies

When the pill was approved for sale in the United States in 1960:

A. it immediately and significantly revolutionized the labor force participation of all women. B. it was met with a lot of resistance and was even illegal in many places. C. it had already been legalized since many states anticipated its approval for years. D. new laws were written to make it illegal, and it remains technically illegal to this day.

The proliferation of the horse in the 17th century caused Great Plains Indians to:

a. increase their reliance on agricultural work. b. engage in less tribal warfare. c. use smaller and more independent hunting groups. d. kill fewer bison, but make more intensive use of the meat on the carcass.