Final answer:
When Lisa offers to sell all of the tamales that she makes to Xavier, they have created a requirements contract.
Step-by-step explanation:
When Lisa offers to sell all of the tamales that she makes to Xavier, they have created a requirements contract. A requirements contract is an agreement between a buyer and a seller where the buyer agrees to purchase all of a specific product or service that they require from the seller. In this case, Lisa is offering to sell all of the tamales she makes to Xavier, which fits the definition of a requirements contract.