Answer:
d) Express warranty
Step-by-step explanation:
Express warranty refers to the sort of warranty wherein the seller explicitly or clearly guarantees for the quality, reliability and durability of his product.
The seller in such cases expressly claims that if products do not meet the standards or quality as claimed by him, such products would be either repaired free of cost or replaced by another similar functional product.
For instance, in case of many watches, an express warranty written statement is accompanied and stamped by the dealer. In case the watches do not meet the mentioned claims, they are either repaired free of cost or replaced.