Where can you find the Tab button in Word 2010?

Where can you find the Tab button in Word 2010?
 
  A) on the Quick Access Toolbar B) on the status bar
  C) on the ruler D) on the Ribbon

- - -

Match the following terms to their meanings:
 
  I. log off
  II. sleep mode
  III. hibernate
  IV. lock mode
  V. restart
 
  A. RAM memory is kept active; personal files and programs remain open
  B. power to RAM is turned off; files and programs are automatically reopened
  C. all files and programs remain open; username/password needed to resume work
  D. all programs are closed; RAM is drained; power is resumed; settings are reset
  E. personal settings are closed; username/password needed to log on again