Which of these is a reasonable approximation of bond sensitivity using duration?

Group of answer choices

$-$D$*$B$/(1+$y$)$

$(-$D$*1000/$ B$)/(1+$y$)$

$(-$D$/$B$)/(1+$y$)$

$-$D$/$B $*(1+$y$)$

D$/$B $*(1+$y$)$