In the GPON system, Huawei recommends not to use level-2 or higher splitting. Which of the following networking are wrong? (Multiple choice)

In the GPON system, Huawei recommends not to use level-2 or higher splitting. Which of the following networking are wrong? (Multiple choice)
A . The first-level spectroscopic 1:32, the second-level spectroscopic 1:16
B. Primary splitting 1:2, secondary splitting 1:8
C. First-level splitting 1:8, second-level splitting 1:64
D. First-level splitting 1:2, second-level splitting 1:16

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Answer: AC