What are 3 examples of backing services, as described in the Twelve Factor app methodology?

What are 3 examples of backing services, as described in the Twelve Factor app methodology?
A . A database
B . A logging tool
C . An email delivery service
D . A background process with a long running task

View Answer

Answer: A,B,C

Explanation:

https/Vdevcenter heroku.com/articles/internal-routing