Which of the following statements is correct?

Select one:

a. Ordinary shares always last forever.

b. If you buy shares in a firm, you have a contractual claim over the income and assets of the firm.

c. If you own shares in a profitable company, but it doesn't pay a dividend, you have the right to sue the company for unpaid dividends.

d. If you buy shares in a firm, you have a residual claim over the income and assets of the firm.