Final answer:
The type of fire-rated Cat5e cable to be used inside buildings is CMP (Communications Plenum) cable, which has a higher fire resistance rating compared to other options.
Step-by-step explanation:
The type of fire-rated Cat5e cable to be used inside buildings is option 3: CMP (Communications Plenum) cable. CMP cables are specifically designed to be used in plenum spaces, which are air handling spaces found in buildings such as drop ceilings or raised floors. These cables have a higher fire resistance rating compared to other options, such as CMX (Outdoor), CMR (Riser), and PVC (Polyvinyl Chloride) cables.