Dynamo is a NoSQL database developed by Amazon. Which of the following about Dynamo is$/$are correct?

Question $8$Select one or more:

a$.$

Dynamo provides security related support for managing data, such as authentication and authorization.

b$.$

Dynamo uses the technique of consistent hashing to map each node to a single datacenter.

c$.$

Dynamo is targeted mainly at applications where no updates are rejected due to concurrent writes.

d$.$

Dynamo is designed to achieve strong consistency and high data availability simultaneously.