Choice "C" is correct. A special purpose framework is a financial basis of accounting other than GAAP that includes cash basis, tax basis, regulatory basis, and contractual basis. Reporting to comply with required regulatory requirements fits a special purpose framework that deviates from traditional GAAP reporting. Choice "a" is incorrect. A report on interim financial information reviewed to determine whether material modifications should be made to conform with GAAP is not included in the definition of a special purpose framework report.
Choice "b" is incorrect. Reports related to feasibility studies presented to illustrate an entity's results of operations are not special purpose framework reports.
Choice "d" is incorrect. Reports on pro forma financial presentations designed to demonstrate the effects of hypothetical transactions are attestation reports, not special purpose framework reports.