You have to identify the correct concept behind each of the following cloud service descriptions. Which of the following is the right concept behind the following description? 
“A cloud service that can be accessed quickly by users over the Internet (Quick response time is important to users)”

Answer options:

A.Fault Tolerance
B.Disaster Recovery
C.Dynamic Scalability
D.Low Latency

Answer – D 
This is an example of low latency. 
Following is a snippet from a Microsoft blog article. 

Option A is incorrect since this is used to ensure that a service is running even in the event of a service failure. 
Option B is incorrect since this is used to ensure that a service is running even in the event of a catastrophic loss. 
Option C is incorrect since this is used to ensure that a service is scalable even when the load on the service increases. 
For more information on the article, please visit the below URL- 

https://azure.microsoft.com/en-us/blog/latency-is-the-new-currency-of-the-cloud-announcing-31-new-azure-edge-sites/