How can this requirement be met with minimal customizations?

A customer requires that when the billing address field on an Account gets updated, the address field on all its related contact records should reflect the same update.

How can this requirement be met with minimal customizations?
A . Create an After Trigger on Account to upd|ate its related contact records on update
B . Create a Workflow Rule on Account to update related child Contact records
C . Create a Lightning Process on Account to update related child Contact records
D . Create a scheduled batch job that updates all contact address fields based on the related account record.

Answer: C