2. Which of the following statements is true regarding the taxation of Social Security benefits? a, 85% is the maximum amount of taxable Social Security benefits. b, 50% is the maximum amount of taxable Social Security benefits. c. If a taxpayer's only source of income is $10,000 of Social Security benefits, then 50% of the benefits are taxable. d. If a taxpayer's only source of income is $10,000 of Social Security benefits, then 85% of the benefits are taxable