In spite of the ________ fate of the nuclear power cooperation agreement, the visit on the whole appeared to have been a success.

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

A．DNA testing should be systematized
B．only authorized laboratories can conduct DNA testing
C．the academy only is authorized to work out standards for testing
D．the academy has the right to accredit laboratories for DNA testing