Answer:
C. Toothpaste in a tube and in a pump are substitute goods and the demand curve for toothpaste in a pump will shift left.
Explanation:
toothpaste in a tube and toothpaste in a pump are substitute goods.
Substitute goods are goods that can be used in place of another good.
If the price of a good increases, the demand for the substitute increases and if the price of the good reduces, the demand for the substitute increases.
Only changes in price of a good can lead to movement along the demand curve for that good. A decrease in the price of toothpaste in a tube would lead to a movement downward along the demand curve
Other factors affecting demand leads to a shift of the demand curve either to the right or to the left.
A decrease in the price of toothpaste in a tube would lead to a decrease in the purchase of toothpaste in a pump. This would lead to a leftward shift of the demand curve of toothpaste in a pump to the left.
