At year-end last year, Conservative Casualty Insurance Company had total assets of $360 million and total liabilities of $310 million. The company's net underwriting income last year was $5 million and net investment income was $3 million. Based on the accounting equation, what was Conservative Casualty's policyholders' surplus at the end of last year? Available answer options Select only one option A $42 million B $50 million C $58 million D $670 million