what is the latency requirement for the Cisco Unified Communications Manager highly available visible network in a clustering over the WAN deployment?

In the Cisco Unified Contact Center Enterprise solution, what is the latency requirement for the Cisco Unified Communications Manager highly available visible network in a clustering over the WAN deployment?

A.
40 ms one-way

B.
40 ms round-trip

C.
400 ms one-way

D.
400 ms round-trip