Why is this design the best remote access design for the environment?

A.
This design provides redundancy in case of site failures and connects users to their
home datacenter while optimizing external WAN traffic.

B.
This design protects against WAN failures and connects users to their home datacenter.

C.
This design will allow for the expected expansion of remote access usage and provides
SSL VPN functionality for future needs.

D.
This design provides intra-site redundancy in case of appliance failures and connects
users to their home datacenter while minimizing internal WAN traffic.

Explanation: