单项选择题

Ifthedispersionofagivenfiberis17ps/nm*kmat1550nmandzeroat1310nm,thenwhatistheaccumulateddispersionofanITUwavelengthafterittravels200km?()

A.0ps/nm
B.340ps/nm
C.200ps/nm
D.3400ps/nm
E.MoreinformationisneedeD.