Exam 1Y0-402 topic 1 question 51 discussion

Scenario: A Citrix Architect has designed an active/passive XenApp and XenDesktop environment for a customer, where the passive datacenter serves as the disaster recovery (DR) datacenter for all users.
The following has been configured:
✑ NetScaler Gateways in both datacenters, each with a unique URL
✑ NetScaler load balancing of StoreFront and Delivery Controller XML services
✑ A separate XenApp and XenDesktop Site at each datacenter
✑ Two StoreFront servers deployed in each datacenter aggregating resources from the Delivery Controllers in the respective datacenter
During a disaster recovery strategy review, the IT infrastructure director recommends exploring cloud-based disaster recovery options for the XenApp and
XenDesktop environment. The director reminds the team that the new solution would also have to support the following objectives:
✑ The DR environment needs to be fully functional in the event that the primary datacenter goes completely offline.
✑ The DR environment should require minimal operating costs until it is needed to host active user sessions.
✑ In a DR event, active user sessions should connect directly to the resource location without going through additional hops.
✑ The architect develops four different conceptual diagrams to display the current architecture as well as the potential cloud-based DR locations.
Click the Exhibit button to view the conceptual diagrams.

Based on the diagrams and above requirements, which Site architecture should the architect use?