Stern Company uses accrual accounting (per FASB) for financial accounting purposes and cash accounting for tax purposes. In 2022, Stern Company had pretax accounting income of $45 million. Stern's only temporary difference for the year was rent received in advance (applicable to 2023 but received in 2022) in the amount of $15 million. What was Stern's taxable income for 2022?

Group of answer choices

a. $60 million

b. $30 million

c. $50 million

d. $45 million