Regarding the over-zone, overlapping coverage control, which of the following statements is wrong?

Regarding the over-zone, overlapping coverage control, which of the following statements is wrong?
A . Station height control: strictly control the station height to avoid over-zone interference
B . Station spacing control: strictly avoid overlapping coverage sites within 100m
C . Topological structure planning: the site distribution is as uniform as possible
D . The angle of the sector in the station should be kept as close as possible to 60 degrees, direct sparring between stations can enhance coverage

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Answer: D