Which of the following cable types can be used to decrease susceptibility to electronic eavesdropping?

Fiber optic cables are the correct choice for decreasing susceptibility to electronic eavesdropping due to their inherent properties. They transmit data using light rather than electrical signals, which makes them immune to electromagnetic interference and difficult to tap into without detection. Since light does not radiate from the fiber in the same way that electrical signals do from conventional copper cables, it becomes significantly harder for unauthorized individuals to intercept the data being transmitted.

Other cable types, such as Fast Ethernet (commonly using twisted pair cables), coaxial, and Thicknet (a variation of coaxial), rely on electrical signals for communication. These cables can be more easily intercepted or subjected to interference, making them less secure in environments where data privacy is a concern. Fiber optics' use of light allows for greater distance without degradation of the signal, further enhancing security and performance in communication systems.