Answer:
Profit re-investments, purchase of another company, financial troubles
Explanation:
The first reasons could be that the company wants to reinvest its profit after it pays out dividends on preferred stocks or in other words if it wants to finance its future growth. Another reasons could be that the company has decided to withhold some of its earnings for future acquisitions. Third possible reason could be that the company wants to defer the payments on common stock for some time.