Which command will silently drop a matching packet?()

A、setrouting-optionsstaticroute10.1.1.1/32no-retain
B、setrouting-optionsstaticroute10.1.1.1/32discard
C、setrouting-optionsstaticroute10.1.1.1/32reject
D、setrouting-optionsstaticroute10.1.1.1/32passive