You are an enterprise application developer. You are designing unit test cases for an account management system of a regional bank. Before creating the application, you create the unit test scenarios by using use cases. Three high-level use cases are outlined as shown in the following exhibit.

You need to write unit tests to test the functionality inside the system.
Which three sets of unit tests should you write? (Each correct answer presents part of the solution. Choose three.)

A.
Write tests that verify whether a teller and a branch manager can each enter transactions.

B.
Write tests that verify whether the correct customer details are retrieved when a valid customer ID is given.

C.
Write tests that verify whether the correct rows are entered in the Account database when a transaction is entered.

D.
Write tests that verify whether the branch manager can create a new customer account.

E.
Write tests that verify the details of an account after it is created.

F.
Write tests that verify whether a teller can look up customers by using a valid customer ID.