At Auction on January 11, 1999, 1 Year US Treasury $r = 6.659 \%$

At auction on January 11, 1999, 1 year US Treasury Bills were sold at a discount of 5.356%. What was the annual yield rounded to the nearest 0.001%

A) $r = 6.659 \%$
B) $r = 5.759 \%$
C) $r = 5.659 \%$
D) $r = 7.659 \%$
E) $r = 5.649 \%$