What cluster caching mechanism should be recommended?

A client is selling up a cluster of eight nodes split across two cabinets in the same datacenter. Each cabinet is on a separate subnet and has separate backup power. The client requires maximum uptime.

What cluster caching mechanism should be recommended?
A . UDP discovery, which is ideal for working across subnets,
B . TCP locators, at least one m each cabinet.
C . TCP locators, one on each node.
D . Use both TCP and UDP locators for maximum up time.

Answer: A