Which operational command on PE2 verifies connectivity across the PE-CE link?

Referring to the exhibit, your network management systems have alerted you to a loss of connectivity to the CE2 router in your Layer 3 VPN. The loopback address of the CE router is 10.10.1.1/32.Which operational command on PE2 verifies connectivity across the PE-CE link?

A.
ping 10.10.1.1

B.
ping 10.10.1.1 table customer-a

C.
ping 10.10.1.1 instance customer-a

D.
ping 10.10.1.1 routing-instance customer-a