Identify the two broad categories of management assertions. OA (1) Assertions about existence or occurence and the related disclosures at period end; and (2) assertions about presentation and disclosure. OB. (1) Assertions about classes of transactions and events and related disclosures; and (2) assertions about account balances and related disclosures. C. (1) Assertions about valuation or allocation; and (2) assertions about completeness. OD. (1) Assertions about valuation or allocation and related disclosures at period end; and (2) assertions about account balances and related disclosures at period end