On a team using IBM Garage method, what Continuous Feedback technique can be used collect user feedback on new features developed by the team?

For a DevOps team, one of the most Important capabilities is Continuous Feedback.

On a team using IBM Garage method, what Continuous Feedback technique can be used collect user feedback on new features developed by the team?
A . A / B test can be used to deploy two different version of a feature in production and monitor how users interact with them
B . A continuous deployment tool can be used to alternate the application version in production environment and monitor their usage by users
C . A design thinking session can be used to define the personas and collect their feeling about new features developed
D . Blue / Green deployment can be used to deploy two different versions of application at same time and collect data on how users are using them

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Answer: D