Answer:
searching products by brand
Step-by-step explanation:
Generally customers search products by brand or by attributes. When you search products by attributes you are looking for some specific product and you are not that interested about the brand of the product, e.g. you are searching for a dress and your emphasis is towards the design of the dress not the brand. When you search by brand, you assign a different value to each brand that you are searching, depending on which brands you like the most or feel more comfortable with.
In this case, Brenda probably has a very good idea about the products that each brand offers and depending on her clients will decide which brand's products to offer.