Which of the following is true?

a. Financial frauds have not occurred in U.S. companies because GAAP has detailed accounting and disclosure requirements.

b. Transaction analysis is basically the same under GAAP and IFRS.

c. IFRS companies have agreed to adopt the Sarbanes-Oxley Act related to internal control in 2025.

d. Foreign companies that trade shares in U.S. markets must reconcile their accounting with the FASB.