An original issue discount may be treated as zero if it is less than$\_\_\_\_\_\_$of the stated redemption price at maturity, multiplied by the number of full years from the date of original issue too maturity.

Select one:

a$.1$ percent

b$.1\mathrm{.}5$ percent

c$.$ one$-$quarter of $1$ percent

d$.$ one$-$half of $1$ percent