What is the purpose of a container?
A. Make it difficult to change the environment that an application runs on
B. Abstract a running application from the environment that it runs on
C. Make it easy to change the runtime that an application uses
D. Allow a complex application to run as a single unit
Reference: https://www.cio.com/article/2924995/what-are-containers-and-why-do-you-need-them.html