Answer:
The correct answer is letter "D": all of the above.
Explanation:
The demand curve is a graph with the "X" and "Y" axis portraying the relationship between the quantity demanded ("X" axis) and the price ("Y" axis). An increase in price implies a decrease in quantity demanded -the demand curve shifts to the left- and a decrease in price rises the quantity demanded -the demand curve shifts to the right.
Though, several other factors could move the demand curve such as changes in tastes, income, expectations about future prices, and the changes in the price of substitutes or complement goods.
