How would they achieve this?

Universal Containers has 3 Heroku apps in its microservices and requires thatlogs for all of the apps be stored in the same location for analysis and alerting purposes .

How would they achieve this?
A . Send logs from each app to their own Heroku redis Store, and then combine all logs in a fourth master store.
B . Set up the 3 apps as producers for Apache Kafka on Heroku and save their logs to Kafka
C . Set up a file on the filesystem and share it with all the apps
D . Install a logging add-on for one app and attach it to the other two apps

Answer: B

Explanation:

https://devcenter.herokuxom/articles/heroku-connect-faq#can-i-use-sharing-rules-to-restrict-record-visibility