A graduated rate estate (GRE) is a testamentary trust that has been designated as such in its first income tax return. Which of the following statements is correct with respect to GREs? Its taxation year must be the calendar year. All of its income will be taxed at the highest federal income tax rate of 33%. It will not be eligible for a dividend tax credit on dividends included in the income of the trust. Its tax return is due 90 days after the trust's year end