Which would lower the price and raise quantity of used? cars?

A.an increase in the number of people selling their used cars

B.a reduction in? incomes, if used cars are an inferior good

C.a reduction in the price of new? cars, a substitute for used cars

D.an increase in wages paid to used car salespeople

Which would explain why the equilibrium price of digital cameras decreased while the quantity has? increased?

A.workers who make digital cameras received a pay raise

B.technological advances in digital camera production

C.consumers' preferences changed in favor of digital cameras

D.a decrease in the price of cell phones that take pictures

Which would cause the equilibrium price and quantity of soda to? increase?

A.a decrease in consumer? income, assuming soda is a normal good

B.an increase in the price for energy? drinks, a good that? soda-makers could make instead

C.an increase in the price of? coffee, a substitute for soda

D.a decrease in the price of? sugar, an input for making soda