Final answer:
Audit partner Turtle, if he knowingly and willfully certified inaccurate financial statements, could face criminal liability under federal securities laws, despite believing they were accurate.
Step-by-step explanation:
If an audit partner like Turtle knowingly certifies inaccurate financial statements, despite being aware of the poor quality of the audit, there may be serious legal implications. Whether Turtle believed in the financial statements' accuracy without much basis, the act of certifying ineptly audited financials can lead to liability. Answer C is correct; if Turtle acted willfully in certifying the flawed audit, he could face criminal liability under federal securities laws. This is because willful certification of false financial statements is a serious offense that can mislead investors and affect market decisions.