Which two sets of actions should an Architect propose?

Universal Containers uses Heroku Connect to sync their Salesforce org’s data with Heroku Postgres. Periodically, they write a very large set of changes that needs to be fully replicated between these two systems.

Which two sets of actions should an Architect propose? (Choose two.)
A . Make the changes directly in Heroku Postgres. Then allow Heroku Connect to expose them to the Salesforce org using Heroku External Objects.
B . Use Data Loader to writethe changes to the Salesforce org. Then allow Heroku Connect to sync them to Heroku Postgres.
C . Make the changes directly in Heroku Postgres. Then allow Heroku Connect to use the Bulk API to sync them to the Salesforce org.
D . Pause Heroku Connect then make the changes directly in the Salesforce org. Then allow Heroku Connect to use the Salesforce Bulk API to sync them to Heroku Postgres.

Answer: B ,C