Answer: a. an e-brand brand
Explanation:
An e-brand is one that provides just an online service for merchandise sales. These companies do not have physical locations but rather show you all that they sell on their websites and then when you purchase something, they deliver it as a physical good. The most popular example of such is Amazon.
The advantage of such brands is that they get to save on the rental and other property costs related to establishing brick-and-mortar stores because they are online.