Which of the following events would increase the supply of tomatoes?

a. The introduction of mechanized tomato pickers, which raises the cost of production.
b. An increase in wages for the tomato pickers.
c. A decrease in the cost of fertilizers for the tomato plants.
d. Unseasonably hot, dry weather in the tomato-growing regions of the nation.
e. A decrease in the price of pasta products.

c