His strange behavior greatly ________ me and my friends as well that evening.

A．would have to leave their fingerprints for further investigations
B．would have to submit evidence for their innocence
C．could easily escape conviction of guilt
D．could be convicted of guilt as well

A．the methods used for blood-cell calculation are not accurate
B．two different individuals of the same ethnic group may have the same DNA fingerprinting pattern
C．a match is by chance left with fingerprints that happen to belong to two different individuals
D．two different individuals leave two DNA samples