Which of the following has also been called the command and control approach?

As one moves downward to the right along a linear demand curve:

a. elasticity of demand is unchanged b. demand becomes more elastic c. demand becomes more inelastic d. one cannot determine what happened in elasticity unless the slope of demand is known e. none fo the above

To say that there is a scarcity of gold means that:

a. gold prices will fall in the future. b. there is not enough gold to satisfy people's demand for it at a zero price. c. there are very few substitutes for gold. d. gold is very expensive. e. the demand for gold is changing.