A remembering a large number of faces

B selecting photographs of faces one likes

C showing one’s face in front of the computer

D recognizing a sequence of face pictures

29. One advantage of “Passfaces” over a password is that ____.

A it is easier to remember

B it is more complicated

C it takes less time to log in

D it allows one to write less

30. What does the author think of the password?

A It provides as much security as before.

B It is an old system that needs improvement.

C It should be abandoned by computer users.

D It has developed to as advanced stage.