Huawei Technologies Co., Ltd. is compliant with GB50174-2008 standard ( ) is compliant with GB50174-2017 standard ( ).

Huawei Technologies Co., Ltd. is compliant with GB50174-2008 standard ( ) is compliant with GB50174-2017 standard ( ).
A . Participating units, Auditing unit
B . Participating units, participating units
C . Auditing unit, Auditing unit
D . Auditing unit, Participating units

Answer: C