Which of the following is not a disaster recovery deployment technique?

Answer options:

A.Pilot light
B.Warm standby
C.Single Site
D.Multi-Site

Answer - C
The below snapshot from the AWS documentation shows the different disaster recovery techniques.
For more information on Disaster recovery techniques, please refer to the below URL:
https://aws.amazon.com/blogs/aws/new-whitepaper-use-aws-for-disaster-recovery/