Final answer:
A forecast projecting a company's sales is known as a demand forecast, vital for planning business strategies. Option C is correct.
Step-by-step explanation:
The forecast that projects a company's sales is c) a demand forecast. A demand forecast involves estimating the quantity of a product or service that consumers will purchase. This type of forecasting helps businesses in planning their production, finances, and marketing strategies by anticipating customer demand.
In the computer market, when many more computers are selling at much lower prices, it is most likely due to a fall in demand. This means that consumers are not purchasing computers at the same rate as before, causing prices to decrease in order to incentivize sales. To illustrate this on a demand and supply diagram, the demand curve would shift to the left, indicating a decrease in demand, while the supply curve would remain unchanged.