You install a WLAN in a warehouse environment for a customer. three months after the installation, the customer reports that the devices in the environment show a poor RSSI is some areas.
Which option is a possible cause of the issue?
A. an increase of stock in the warehouse
B. an increase in the number of wireless clients
C. RF interference from external sources, such as microwave ovens
D. another WLAN installed in a neighboring warehouse.
