How many switches are used in a three-way switch setup?

In a three-way switch setup, two switches are used to control a single light fixture from two different locations. This configuration allows for the convenience of turning a light on or off from multiple points. Each switch in this setup is called a three-way switch, which has three terminals – one common and two traveler terminals. When the switches are flipped, they alternate the pathway of the electrical current, enabling the operation of the light fixture from either switch. Thus, the correct answer reflects the fact that two three-way switches are needed to create this kind of control mechanism.