Final answer:
A Roth IRA can be an eligible shareholder of an S corporation.
Step-by-step explanation:
According to the characteristics of an S corporation, only certain types of shareholders are eligible to own stock. In the given choices, a Roth IRA can be an eligible shareholder of an S corporation. A Roth IRA is an individual retirement account in which contributions are made with after-tax dollars, and qualified distributions are tax-free.