A small office needs to connect one new system to their network in a distant office, but does not have the resources to install a new Ethernet wall jack, and does not want to use wireless. Which of…

SONET is a carrier-grade fiber optic transport technology requiring substantial infrastructure investment, not a simple or low-cost option for a small office.

Multimode fiber requires installing new cable runs with compatible switches and NICs, which is neither simple nor cost effective when avoiding new cabling.

802.11n is a wireless standard, which the scenario explicitly rules out as an undesired option.

BPL (also called Powerline networking or HomePlug) transmits data signals over existing AC electrical wiring using adapters that plug into standard outlets. This requires no new cable runs and no wireless radio, making it a simple and cost-effective solution for extending a network to a distant room or office that lacks Ethernet infrastructure.