Star topology is :A. Sends calls over the least expensive routes available B. Enables a hotel to add to the cost of a call C. Allows users to make a call using a broadband Internet connection D. A wireless standard for High-Speed Internet Access

A. Sends calls over the least expensive routes available

Explanation:

Star topology is also known as the star network, it's the network topology for a local area network that connects all available nodes to a central connection point such as a switch or hubs using a cable and it forms a star.

Star topology sends calls over the least expensive routes available.

A. send calls over the least expensive routes available.

Explanation:

Star topology is one of the most common network setup with star network. In star network all hosts are connected to the central hub. The central hub transmits messages to all hosts. Star topology is usually suitable for local are network LAN. In this setup all nodes are connected to central connection point and many networks are connected to single core network. The devices connected to central hub can intercommunicate with each other.