Which of the following statements regarding the sale of a personal residence is true? a. A one-time election is available to taxpayers 55 years of age or older which allows them to sell their personal residences and to exclude all of the realized gain. b. A taxpayer's personal residence qualifies for a like-kind exchange. c. The exclusion amount for married taxpayers applies to spouses who sell their residence within 2 years of their spouse's death. d. A taxpayer who sells a personal residence may always exclude the realized gain from taxable income