Answer:
A. The salesperson gave an expressed warranty
Explanation:
An expressed warranty is a written or spoken word that guarantee that a product meets a certain needs, quality or reliability. However if the product fails to meet the stated quality or needs as said by the seller or manufacturer, he or she will be liable to replace the product or fix the product at no additional cost.
In relation to the question. The salesperson promising the purchased agent has automatically given an expressed warrant and will be liable to fix the product if the purchasing agent decides to take it up against him.