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In the screenshot, click the icon of the preference pane where you access the controls to encrypt the computer's hard disk.
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In OS X, which of these can you use to set a firmware password?
A. The Security and Privacy pane of System Preferences
B. The Firmware Password utility on the Recovery partition
C. The Firmware Password utility in /System/Library/CoreServices/
D. The Users and Groups pane of System Preferences
When a firmware password is set on a Mac, which of these becomes more difficult for unauthorized users to do?
A. Installing applications on the Mac
B. Accessing the Internet from the Mac
C. Pairing Bluetooth devices with the Mac
D. Starting up the Mac from the Recovery HD partition