1)Suppose we observe that as the price of lettuce decreases from $4 to $3 per head, consumers buy only half the number of heads of lettuce. This situation is best described as ...

a) an increase in demand.

b-a decrease in demand.

c-a decrease in the quantity supplied.

d-an increase in supply.

e-an increase in the quantity demanded.

2)Which one of the following is a positive question?

a-What is the optimal level of income inequality?

b-How much effort should we devote to addressing climate change?

c-Is free trade a good policy?

d-What is the minimum wage in California?

e-Should the government run a budget deficit?