Which setup sequence best describes the prerequisites for setting up Oracle Purchasing?

Which setup sequence best describes the prerequisites for setting up Oracle Purchasing?

A.
Set up user. > Assign responsibilities. > Define a Ledger.

B.
Set Address Styles. > Define locations. > Set key profile options.

C.
Set up descriptive flexfields. > Set key profile options. > Set address style default.

D.
Define a Ledger. > Set up descriptive flexfields. > Define Purchasing Lookup Codes.

E.
Define Human Resources key flexfields. > Define a Ledger > Create responsibilities.

Explanation: