Which Practice Helps Prevent Injuries to the Wrist When Using

Which practice helps prevent injuries to the wrist when using the computer keyboard for extended periods of time?

A) Keep the wrists as straight as possible.
B) Use the edge of desk or wrist rests for support while keyboarding.
C) Lower the level of the keyboard so that hands are below the elbows.
D) Raise the level of the keyboard so that hands are above the elbows.