AWS specifies that core applications are deployed to an N$+1$ standard. Which of the following statements in true regarding the N$+1$ standard?

No matter how many security countermeasures we put in place there is always one more security issue to consider

In the event of a data center failure, there is sufficient capacity to enable traffic to be load$-$balanced to the remaining sites.

N$+1$ is the amount of time it will require to restore an S$3$ bucket from a backup where N is determined by the size of the bucket.

N$+1$ is the cost to the customer to ensure availability of on$-$site resources rather than cloud resources.