The Securities Exchange Act of 1934 Established Extensive Reporting Requirements

The Securities Exchange Act of 1934 established extensive reporting requirements for listed companies. Which is not a commonly required report?

A) Form 10-Q. An extensive quarterly report, including financial statements.
B) Form S-2. A registration statement
C) Form 10-K. An extensive annual report, including financial statements
D) Form 8-K. A report used to describe significant events that may affect the company.