What is the purpose of the Deep Security Relay?

A: Deep Security Relays distribute load to the Deep Security Manager nodes in a high-availability implementation. B: Deep Security Relays forward policy details to Deep Security Agents and Virtual Ap-pliances immediately after changes to the policy are applied. C: Deep Security Relays maintain the caches of policies applied to Deep Security Agents on protected computers to improve performance. D: Deep Security Relays are responsible for retrieving security and software updates and distributing them to Deep Security Manager, Agents and Virtual Appliances.