When performing internal audit assistance services, client management should do the following: Select the best response and then click "Submit". O A. Review all of the internal audit workpapers that we prepare. B. Designate an employee with suitable skill, knowledge and/or experience, preferably within senior management, to be responsible for the internal audit function. C. Determine the scope, risk and frequency of internal audit activities, including those performed by us. O D. Both B and C.