In order to qualify as a REIT, A) at least 90% of the assets must be invested in real-estate related assets. B) a mortgage REIT must have at least 75% of the assets in government-insured mortgages. C) at least 75% of the income must be paid out as dividends to investors. D) at least 75% of the assets must be invested in real-estate related assets, cash, and U.S. government securities.