$30)$ An increase the expected future price of a good

A$)$ increases its demand.

B$)$ decreases its demand.

C$)$ increases its supply.

D$)$ has no effect on either its demand or its supply.

$31.$ If consumers but not producers expect that the price of soda will rise in November, the

A$)$ supply of soda in October will increase.

B$)$ demand for soda in October will decrease.

C$)$ demand for soda in October will increase.

D$)$ supply of soda in October will decrease.

$32.$ Which of the following shifts the demand curve for movie downloads rightward?

A$)$ a decrease in the price of downloading a movie

B$)$ a $10$ percent increase in people's income if movie downloads are a normal good

C$)$ a decrease in the price of cable television service

D$)$ an increase in the quantity and quality of programming included in the basic cable television service package

$33)$ If macaroni and cheese is an inferior good, an increase in income will

A$)$ not affect the demand for macaroni and cheese.

B$)$ decrease the demand for macaroni and cheese.

C$)$ increase the demand for macaroni and cheese.

D$)$ create no income effect.

$34.$Which of the following shifts the supply curve rightward?

A$)$ an increase in the population

B$)$ a positive change in preferences for the good

C$)$ a decrease in the price of the good

D$)$ a decrease in the price of a factor of production used to produce the good

$35.)$ Auto workers negotiate a wage increase. How does this wage hike affect the supply of cars?

A$)$ It decreases the supply.

B$)$ It increase the supply.

C$)$ It has no effect.

D$)$ There is not enough information to tell if the change increases, decreases, or has no effect on the supply of cars.

$36.$ Good A and good B are substitutes in production. The demand for good A increases so that the price of good A rises. The increase in the price of good A shifts the

A$)$ demand curve for good B leftward.

B$)$ demand curve for good B rightward.

C$)$ supply curve of good B leftward.

D$)$ supply curve of good B rightward.

$37.$ A bakery can produce either cakes or cookies. If the price of cookies rises, then

A$)$ the supply curve of cake shifts leftward.

B$)$ the supply curve of cake shifts rightward.

C$)$ there is a movement downward along the supply curve of cakes.

D$)$ there is a movement upward along the supply curve of cakes.