AC配置如下，终端与AP交互的报文长度为多大时需要开启RTS/CTS？（）[AC6605-wlan-view]radio-2g-profilenamedefault [AC6605-wlan-radio-2g-prof-default]rts-cts-moderts-cts [AC6605-wlan-radio-2g-prof-default]rts-ctsthreshold1500

A.<1500Byte
B.1500Byte
C.>1500Byte
D.1024Byte