Final answer:
An accountant is liable under Section 18 of the Securities Exchange Act of 1934 for negligently preparing and filing an incorrect quarterly report with the SEC.
Step-by-step explanation:
Under the liability provisions of Section 18 of the Securities Exchange Act of 1934, an accountant would generally be liable for negligently preparing and filing with the Securities and Exchange Commission (SEC) a reporting corporation's incorrect quarterly report. This is because Section 18 holds individuals liable if they make or cause to be made a false or misleading statement in any application, report, or document filed with the SEC with no proper diligence. Therefore, the correct answer would be C) Negligently preparing and filing with the SEC a reporting corporation's incorrect quarterly report.