Answer:
The correct answer is letter "E": brand.
Step-by-step explanation:
By collecting purchase information directly from consumers, the most relevant data that could be gathered is related to the brand. Price, quality, customs, or promotions may determine why consumers prefer one brand over another. This information is helpful for retailers, such as Amazon, to build relationships with the companies whose products the clients would buy. The more the consumers buy those goods, the more products in stock the retailer should have.