How does Cloud Identity Engine (CIE) simplify deployment of cloudbased services to provide user authentication?

How does Cloud Identity Engine (CIE) simplify deployment of cloudbased services to provide user authentication?
A . It allows configuration of an authentication source once instead of for eachauthentication method.
B. It expands the capability to filter and forward decrypted and non-decrypted Transport Layer Security (TLS) traffic.
C. It ensures that a compromised master key does not compromise the configuration encryption for an entire deployment.
D. It authenticates users via a cloud-based service and refers to the hub for mappings for group identification.

Answer: D