Which of the Following Can Increase the Number of Pizzas

Which of the following can increase the number of pizzas a seller is willing to sell at a given price?

A) The cost of inputs such as pepperoni and cheese goes up.
B) The amount of subsidies that pizza makers receive from the government decreases.
C) The number of workers working in the pizza factory decreases.
D) A new technology is developed that allows producers to make the same sized pizza using less cheese and dough.