Which of the following professional services would be considered an attestation engagement?A. Advising management in the selection of a computer system to meet business needs.B. Preparing the income statement and balance sheet for one year in the future based on client expectations and predictions.C. Advocating on behalf of a client about trust tax matters under review by the Internal Revenue Service.D. Providing financial analysis, planning, and capital acquisition services as a part-time, in-house controller.