A demand schedule shows

a) the quantities that people plan to buy in all possible circumstances

b) the quantities that people plan to buy at each different price when all other influences on buying plans remain the same

c) the quantities that people would plan to buy if they could afford them at each different price when all other influences on buying plans remain the same.

D) the quantities that people plan to buy at each different income when all other influences on buying plans remain the same.

E) the quantities that people plan to buy at each different price as long as producers are willing to supply that quantity.