Final answer:
A technician would use an RG-6 coaxial cable to connect a cable modem to the wall outlet, as this is the standard cabling used for cable internet services.
Step-by-step explanation:
A technician installing a cable modem for internet connectivity in a home office would typically use an RG-6 coaxial cable to connect the modem to the wall outlet. The reason for this is because cable modems are designed to receive signals through either coaxial or fiber optic cables. In most cases, especially for consumer connections, these signals are provided through coaxial cabling, and RG-6 is a common type of coaxial cable used for cable television and internet services. Cat 5e and Cat 6a cables are types of Ethernet cables used in networking to connect devices to switches, routers or other network interfaces, and are not typically used to connect the modem to the wall outlet. Multi-mode fiber is an option for high-speed internet connectivity but is less common for standard home installations due to its complexity and cost.