The correct answer is C. 10baseT.
10baseT is a twisted pair Ethernet standard that uses unshielded twisted pair (UTP) cable to connect devices to a 10 Mbit/s Ethernet network. It is the most common type of Ethernet cable used in homes and businesses.
10base2 is a thin coaxial Ethernet standard that uses thin coaxial cable to connect devices to a 10 Mbit/s Ethernet network. It is no longer commonly used, but it was once the most common type of Ethernet cable.
10base5 is a thick coaxial Ethernet standard that uses thick coaxial cable to connect devices to a 10 Mbit/s Ethernet network. It is no longer commonly used, but it was once the most common type of Ethernet cable.
10baseFL is a fiber optic Ethernet standard that uses fiber optic cable to connect devices to a 10 Mbit/s Ethernet network. It is not commonly used, but it is used in some high-speed networks.
RJ-45 is a type of connector that is used with twisted pair Ethernet cables. It is the most common type of Ethernet connector used in homes and businesses.