CompTIA A+ 220-902 Question C-6

When connecting a Bluetooth device to a mobile device, which of the following BEST describes the purpose of discovery mode?

A. Allows two Bluetooth devices to connect to each other without a mobile device
B. Disconnects all devices and connects to the closest powered on device
C. Allows a peripheral to be contacted by the mobile device
D. Instructs the phone to seek out all nearby devices and connect to them