【单选题】"The technology" in the second paragraph refers to ______.
                    
A.face-scanning systems
B.fingerprint systems
C.gummy dummies
D.biometrics
                
							【单选题】"The technology" in the second paragraph refers to ______.
                    
A.face-scanning systems
B.fingerprint systems
C.gummy dummies
D.biometrics
                
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