Final answer:
Mateo should establish a comprehensive FAQ section on the website to alleviate customer concerns about sizing and care, similar to strategies used by successful mail-order businesses like L.L. Bean to address imperfect information issues.
Step-by-step explanation:
To avoid customer frustration regarding sizing and care instructions before placing an order, Mateo must establish a comprehensive FAQ section on the company website. This solution aligns closely with the experience at Gavi's Fast Food Restaurant, where addressing customer concerns through a direct and practical change, such as floor markings, led to enhanced customer service and efficiency. Comparable to firms like L.L. Bean, which thrive on a mail-order model, providing clear and helpful information is critical when customers cannot physically interact with products. Therefore, the most suited option is the third one, which focuses on providing upfront information to mitigate imperfect information issues for an online clothing company.