How can the current architecture be enhanced to ensure this?

You work for a cosmetic company which has their production website on AWS. The site itself is in a two-tier
configuration with web servers in the front end and database servers at the back end. The site uses using
Elastic Load Balancing and Auto Scaling. The databases maintain consistency by replicating changes to each
other as and when they occur. This requires the databases to have extremely low latency. Your website needs
to be highly redundant and must be designed so that if one availability zone goes offline and Auto Scaling
cannot launch new instances in the remaining Availability Zones the site will not go offline. How can the current
architecture be enhanced to ensure this?

A.
Deploy your site in three different AZ’s within the same region. Configure the Auto Scaling minimum to
handle 50 percent of the peak load per zone.

B.
Deploy your website in 2 different regions. Configure Route53 with a failover routing policy and set up health
checks on the primary site.

C.
Deploy your site in three different AZ’s within the same region. Configure the Auto Scaling minimum to
handle 33 percent of the peak load per zone.

D.
Deploy your website in 2 different regions. Configure Route53 with Weighted Routing. Assign a weight of
25% to region 1 and a weight of 75% to region 2.