During the implementation of Salesforce, a customer has the following requirements for Sales Order: 1. Sales Order infor

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During the implementation of Salesforce, a customer has the following requirements for Sales Order:
1. Sales Order information needs to be shown to users in Salesforce.
2. Sales Orders are maintained in the on-premise enterprise resource planning (ERP).
3. Sales Order information has more than 150 million records.
4. Sales Orders will not be updated in Salesforce.
What should a data architect recommend for maintaining Sales Orders in Salesforce?

A. Use custom objects to maintain Sales Orders in Salesforce.
B. Use external objects to maintain Sales Orders in Salesforce.
C. Use custom big objects to maintain Sales Orders in Salesforce.
D. Use Standard Order object to maintain Sale Orders in Salesforce.