A company has an external system that stores client accounting data but they want to be able to search for this data within Salesforce. What three steps should the administrator take to implement this functionality?

A. Create an automated import of the external data using the Job Scheduler

B. Create an automated data capture (or the external system

C. Create an Indirect Lookup field to connect to the Account

D. Create an External Object for each fable of accounting data in the external system

E. Create an External Data Source pointing to the external system's database