[ Grammar ]
Which statement is correct ?
A. One of the first results of the police investigation were a redesigning of the whole security system.
B. One of the first results of the police investigation was a redesigning of the whole security system.
C. One of the first results of the police investigation are a redesigning of the whole security system.
D. One of the first results of the police investigation have been a redesigning of the whole security system.
Select your answer:

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