4. Which of the following is not an acceptable partnership tax year? (Points : 5) 1. The tax year used by any principal partner 2. The tax year used by the partners who own a majority interest 3. A tax year that results in a 2-month deferral of income for the partners 4. Cs tax year if C owns more than 50% of the partnership 5. A year-end that coincides with the partnerships natural business year