The slowest transmission speeds are those of

Answer: Option A

Twisted-pair wire has the slowest transmission speeds among the given options.

It is commonly used in telephone networks and older data communication networks.

Coaxial cable has higher transmission speeds compared to twisted-pair wire and is used in cable TV and internet services.

Fiber-optic cable offers the highest transmission speeds as it uses light to transmit data.

Microwaves are used for wireless transmission and offer higher speeds compared to twisted-pair wire.