关于CIO（cellIndividualOffset），以下哪组参数的选

单选题关于CIO（cellIndividualOffset），以下哪组参数的选择，更有利于解决A3切换的拐角效应问题？ | About cellIndividualOffset (CIO), Which configuration can improve the Event-A3 handover performance at the street corner.

A、服务小区CIO = 3，邻区CIO=3 | CIO of Serving Cell is 3, CIO of Neighor is 3.

B、服务小区CIO = 3，邻区CIO = -3 | CIO of Serving Cell is 3, CIO of Neighor is -3.

C、服务小区CIO = -3，邻区CIO = 3 | CIO of Serving Cell is -3, CIO of Neighor is 3.

D、服务小区CIO = -3，邻区CIO = -3 | CIO of Serving Cell is -3, CIO of Neighor is -3.

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