Final answer:
The specific rules partnerships must follow in determining a partnership's taxable year-end are to minimize the amount of aggregate tax deferral partners receive and to align the year-end of the partnership with the year-end of a majority of the partners.
Step-by-step explanation:
The rationale for the specific rules partnerships must follow in determining a partnership's taxable year-end is d. Both to minimize the amount of aggregate tax deferral partners receive and to align the year-end of the partnership with the year-end of a majority of the partners.
Partnerships are generally pass-through entities, meaning the income and deductions of the partnership are passed through to the partners. By having a common tax year-end, partners can synchronize their personal taxes with those of the partnership, simplifying tax calculations and minimizing tax deferral. It also allows tax practitioners to spread their workload more evenly throughout the year.