Where are the tour phones kept?

The correct answer is that the tour phones are kept downstairs by the printer. This location is designated for easy access to the phones that are necessary for conducting tours, allowing ambassadors to quickly retrieve them and ensure a smooth operation. Having the tour phones in a centralized location near the printer helps streamline the process, as ambassadors can gather the phones as they prepare for their tours without having to navigate through other areas of the facility.

The other locations mentioned, such as the Call Center, front desk, and conference room, do not serve this purpose. The Call Center would typically be focused on different communication roles, the front desk is often busy with reception duties, and the conference room is reserved for meetings, making them less practical for storing items needed for conducting tours.