Question-42: You are a member of the design team for a huge distributed application that has 30 microservices. You have created an application that is similar to a tiny TV and can only be accessed by users who have registered to the service. These users are limited to watching a maximum of 100 movies per day. Every one of your decentralised microservices has to establish a connection to a back-end database. You will want to save the credentials in a safe place. Where should you save the credentials that you've been given?
A. In the source code
B. In an environment variable
C. In a secret management system
D. In a config file that has restricted access through ACLs

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