Which of the following is$/$are elements of an effective waiver for a preretirement survivor annuity?

$-1.$The waiver must be signed within six months of death.

$-2.$The waiver must be signed by a plan participant.

$-3.$The waiver must be notarized or signed by a plan official.

A$.)3$ only.

B$.)1$ and $2.$

C$.)2$ and $3.$

D$.)1,2,$ and $3.$