Ralph is a network consultant with a client who wants him to design the Local Area Network $($LAN$)$ for his company's new branch office. The site consists of a building with Unshielded Twisted Pair $($UTP$)$ cable already installed, which the client considered a major selling point when selecting the property. He wants Ralph to install the fastest possible LAN using the existing cable. After examining the site, Ralph notes that the cable is Category $5($CAT$5),$ installed using a star topology, and that the individual cable runs are all less than $100$ meters long. Which of the following Ethernet physical layer specifications can Ralph use for the new network to provide the fastest transmission speeds without replacing the cable?

Question $8$ options:

$10$GBase$-$T

$100$Base$-$TX

$1000$Base$-$T

$1000$Base$-$LX