Which configuration would make an IP SLA probe use a precedence value of 3?()
A、ip sla 1 icmp-echo 1.1.1.1 tos 12
B、ip sla 1 icmp-echo 1.1.1.1 tos 96
C、ip sla 1 icmp-echo 1.1.1.1 precedence 3
D、ip sla 1 icmp-echo 1.1.1.1 dscp 12