Which two security roles should you grant to the customers?

You need to design a security strategy to support the planned changes for the customer databases, The solution must meet the security requirements.

Which two security roles should you grant to the customers? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.
A . db_datawriter
B . dbcreator
C . db_ddladmin
D . db_datareader

Answer: C,D

Explanation:

From Scenario: Security requirements