Portability of a deceased spouses unused lifetime exclusion amount

A) Can be elected only through a timely filing of a Form 706.

B) Can be granted via an amended tax return of the surviving spouse.

C) Permits the surviving spouse to apply the decedents unused exclusion amount to the surviving spouses own transfers during life, but not at death.

D) Is granted via an election on the decedents fiduciary income tax return.