Final answer:
The Fiber optic system is the communication system that offers safeguards and countermeasures for transmitting unencrypted information, thanks to properties like low loss, high bandwidth, and reduced crosstalk.
Step-by-step explanation:
The type of communication system that includes adequate safeguards and countermeasures for the transmission of unencrypted information is the Fiber optic system.
These systems utilize optical fibers which offer several benefits over traditional wireline systems. Optical fibers present low loss, meaning that light can travel great distances without significant dimming, high bandwidth which allows for more conversations or data transmission over a single fiber, and reduced crosstalk, therefore, signals in one fiber do not interfere with others.
This inherent security of signal transmission in optical fibers makes them suitable for transmitting unencrypted information with adequate safeguards.