The correct answer is A. Consumers want more video-game systems than the company can make.
Step-by-step explanation:
In the economy and related fields, a shortage occurs if the supply (units of a product available) is lower than the demand (consumers that want the product); this implies, the quantity of a product is not enough, and therefore just some consumers will be able to buy the product even if all want this product and can pay for it.
This situation occurs in "Consumers want more video-game systems than the company can make" because in this case, the number of consumers (demand) is higher than the number of video-game systems (supply) and therefore not all the possible consumers can have this product.