In this scenario, a Basic Service Set (BSS) is the most appropriate setup, as it consists of a single access point and the client devices that connect to it. BSS is the simplest type of 802.11 wireless network structure and is ideal for small areas that only require a single access point. An Extended Service Set (ESS) involves multiple access points to create one large network, which is unnecessary for the described small office. An Independent Basic Service Set (IBSS) is a peer-to-peer network without an access point, typically used for ad-hoc or direct device-to-device networking.