Which three stages should the Architect consider to reduce the security concerns for this Integration use case?

Universal Containers would like to integrate Salesforce to their Accounting system. Salesforce must notify the accounting system for every new account that has been created. The security team will not allow Salesforce to integrate directly to the accounting system due to potential security issues.

Which three stages should the Architect consider to reduce the security concerns for this Integration use case? Choose 3 answers
A . Terminate the SSL connection at a reverse proxy in the DMZ which establishes trust in the connection using mutual SS
C . Enable WS-security for the web services made between Salesforce and the accounting system.
D . Whitelist the Salesforce IP range on the firewall to ensure only Salesforce- originated traffic can penetrate the network.
E . Utilize an Enterprise Service Bus to ensure Accounting system credentials are not stores within Salesforce.
F . Enable platform encryption in the Salesforce org to ensure network communication to the Accounting system is encrypted.

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Answer: B,D,E