Which of the following is TRUE about Bluetooth?

a. If a computer or device is not Bluetooth-enabled, you must replace it in order to use Bluetooth.
b. Bluetooth connections have high security risks.
c. If a device has Bluetooth capability, using Bluetooth technology is free.
d. Bluetooth has high bandwidth.

In the context of the box model, what is the difference between a margin and a padding? a. a padding lies outside a box border, while a margin lies inside it. b. a padding lies inside a box border, while a margin lies outside it. c. a padding can be adjusted independently, while a margin depends on the size of its box. d. a padding depends on the size of its box, while a margin can be adjusted independently.