单项选择题
Forlaserswithtightlycontrolledwavelengths，approximatelyhowfarapartarethecentersofadjacentwavelengthswhen100GHzspacingisusedinaDWDMsystem？（）
- A.0.4nanometers
B.0.6nanometers
C.0.8nanometers
D.1.2nanometers
E.1.6nanometers
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C.ConfigurationandOrderingTool
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