Final answer:
The digital touchpoint for a retail company among the given options is c) A customer browsing products on the company's website, as it involves digital engagement with the company's assets.
Step-by-step explanation:
A digital touchpoint for a retail company refers to any interaction that occurs through digital means or platforms between the company and the customer. Given the options, a customer browsing products on the company's website falls into this category as it involves engaging with the company's digital assets – in this case, the website – to gain information or complete a transaction.
On the other hand, receiving a brochure via mail, visiting a physical store location, and interacting with a salesperson in-store are all non-digital or physical touchpoints. Therefore, the correct answer is c) A customer browsing products on the company's website.