If a 10 percent price increase causes the quantity demanded for a good to decrease by 5 percent, demand is elastic

The above figure shows three different supply-and-demand graphs. Which graph best represents the market for the air we are currently breathing?

A) Graph A B) Graph B C) Graph C D) None of the above.

If the supply curve of cigarettes shifts to the left, quantity demanded for cigarettes

A) will decrease substantially. B) will increase substantially. C) will slightly increase. D) will slightly decrease.