How are cash-based or accrual-based principles related to private and public issuers?

When analyzing fixed-income securities, issuers can be either public or private. Which of the following sentence is true according to the CFA Institute? a) Public issuers use accrual-based principles (GAAP) while private issuers use cash-based principles. b) Private issuers use accrual-based principles (GAAP) while public issuers use cash-based principles. c) Both public and private issuers