Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) A demand curve shows the relationship between a product's price and the number of units consumers want to buy at each price, assuming there are no changes in other factors affecting demand.
B) A demand curve shows the relationship between consumer income and the quantity purchased of some product.
C) A demand curve shows the relationship among consumer income, price of a product, quantity supplied, and the number of units of that product consumers want to buy.
D) A demand curve is drawn with the assumption that demand equals supply.